121684564 has 24 divisors (see below), whose sum is σ = 219218048. Its totient is φ = 59058720.

The previous prime is 121684561. The next prime is 121684603. The reversal of 121684564 is 465486121.

It is a super-4 number, since 4×121684564⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121684561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92737 + ... + 94039.

Almost surely, 2^121684564 is an apocalyptic number.

It is an amenable number.

121684564 is a deficient number, since it is larger than the sum of its proper divisors (97533484).

121684564 is a wasteful number, since it uses less digits than its factorization.

121684564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975 (or 1973 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 121684564 is about 11031.0726586312. The cubic root of 121684564 is about 495.5397493028.

The spelling of 121684564 in words is "one hundred twenty-one million, six hundred eighty-four thousand, five hundred sixty-four".