121397964 has 24 divisors (see below), whose sum is σ = 283465728. Its totient is φ = 40436880.

The previous prime is 121397929. The next prime is 121397971. The reversal of 121397964 is 469793121.

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, 19749 + ... + 25155.

It is an arithmetic number, because the mean of its divisors is an integer number (11811072).

Almost surely, 2^121397964 is an apocalyptic number.

It is an amenable number.

121397964 is an abundant number, since it is smaller than the sum of its proper divisors (162067764).

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

121397964 is a wasteful number, since it uses less digits than its factorization.

121397964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285 (or 7283 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 121397964 is about 11018.0744234190. The cubic root of 121397964 is about 495.1504001708.

The spelling of 121397964 in words is "one hundred twenty-one million, three hundred ninety-seven thousand, nine hundred sixty-four".