150242978 has 4 divisors (see below), whose sum is σ = 225364470. Its totient is φ = 75121488.

The previous prime is 150242951. The next prime is 150242999. The reversal of 150242978 is 879242051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879242051 = 227 ⋅3873313.

It can be written as a sum of positive squares in only one way, i.e., 125372809 + 24870169 = 11197^2 + 4987^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37560743 + ... + 37560746.

Almost surely, 2^150242978 is an apocalyptic number.

150242978 is a deficient number, since it is larger than the sum of its proper divisors (75121492).

150242978 is an equidigital number, since it uses as much as digits as its factorization.

150242978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75121491.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 150242978 is about 12257.3642354301. The cubic root of 150242978 is about 531.6160216606.

The spelling of 150242978 in words is "one hundred fifty million, two hundred forty-two thousand, nine hundred seventy-eight".