121904152 has 64 divisors (see below), whose sum is σ = 254822400. Its totient is φ = 54432000.

The previous prime is 121904149. The next prime is 121904173. The reversal of 121904152 is 251409121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192877 + ... + 193507.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^121904152 is an apocalyptic number.

It is an amenable number.

121904152 is an abundant number, since it is smaller than the sum of its proper divisors (132918248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121904152 is a wasteful number, since it uses less digits than its factorization.

121904152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 121904152 is about 11041.0213295691. The cubic root of 121904152 is about 495.8376484775.

The spelling of 121904152 in words is "one hundred twenty-one million, nine hundred four thousand, one hundred fifty-two".