150 (number)

In mathematics

• 150 is the sum of eight consecutive primes. Given 150, the Mertens function returns 0.
• 150 is conjectured to be the only minimal difference greater than 1 of any increasing arithmetic progression of n primes that is not a primorial.
• The sum of Euler's totient function φ over the first twenty-two integers is 150.
• 150 is a Harshad number and an abundant number.
• 150 degrees is the measure of the internal angle of a regular dodecagon.

In other fields

• The number of degrees in the quincunx astrological aspect explored by Johannes Kepler.
• The approximate value for Dunbar's number, a theoretical value with implications in sociology and anthropology. It is actually 148.