121772992 has 28 divisors (see below), whose sum is σ = 263612376. Its totient is φ = 55351040.

The previous prime is 121772977. The next prime is 121773013. The reversal of 121772992 is 299277121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85783 + ... + 87190.

Almost surely, 2^121772992 is an apocalyptic number.

It is an amenable number.

121772992 is an abundant number, since it is smaller than the sum of its proper divisors (141839384).

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

121772992 is a wasteful number, since it uses less digits than its factorization.

121772992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172996 (or 172986 counting only the distinct ones).

The product of its digits is 31752, while the sum is 40.

The square root of 121772992 is about 11035.0800631441. The cubic root of 121772992 is about 495.6597562487.

The spelling of 121772992 in words is "one hundred twenty-one million, seven hundred seventy-two thousand, nine hundred ninety-two".