121865792 has 56 divisors (see below), whose sum is σ = 258820920. Its totient is φ = 56729600.

The previous prime is 121865773. The next prime is 121865803. The reversal of 121865792 is 297568121.

It can be written as a sum of positive squares in 4 ways, for example, as 28472896 + 93392896 = 5336^2 + 9664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109334 + ... + 110442.

Almost surely, 2^121865792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121865792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129410460).

121865792 is an abundant number, since it is smaller than the sum of its proper divisors (136955128).

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

121865792 is a wasteful number, since it uses less digits than its factorization.

121865792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1229 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 121865792 is about 11039.2840347552. The cubic root of 121865792 is about 495.7856340402.

The spelling of 121865792 in words is "one hundred twenty-one million, eight hundred sixty-five thousand, seven hundred ninety-two".