121865804 has 12 divisors (see below), whose sum is σ = 213342528. Its totient is φ = 60910800.

The previous prime is 121865803. The next prime is 121865813. The reversal of 121865804 is 408568121.

It is not an unprimeable number, because it can be changed into a prime (121865803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18149 + ... + 23939.

It is an arithmetic number, because the mean of its divisors is an integer number (17778544).

Almost surely, 2^121865804 is an apocalyptic number.

It is an amenable number.

121865804 is a deficient number, since it is larger than the sum of its proper divisors (91476724).

121865804 is a wasteful number, since it uses less digits than its factorization.

121865804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056 (or 11054 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 121865804 is about 11039.2845782686. The cubic root of 121865804 is about 495.7856503134.

The spelling of 121865804 in words is "one hundred twenty-one million, eight hundred sixty-five thousand, eight hundred four".