121684080 has 80 divisors (see below), whose sum is σ = 431115264. Its totient is φ = 27813120.

The previous prime is 121684067. The next prime is 121684091. The reversal of 121684080 is 80486121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34536 + ... + 37895.

Almost surely, 2^121684080 is an apocalyptic number.

121684080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121684080 is an abundant number, since it is smaller than the sum of its proper divisors (309431184).

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

121684080 is a wasteful number, since it uses less digits than its factorization.

121684080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72454 (or 72448 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 121684080 is about 11031.0507205796. The cubic root of 121684080 is about 495.5390922993.

The spelling of 121684080 in words is "one hundred twenty-one million, six hundred eighty-four thousand, eighty".