121604520 has 64 divisors (see below), whose sum is σ = 367110720. Its totient is φ = 32223744.

The previous prime is 121604491. The next prime is 121604521. The reversal of 121604520 is 25406121.

It is not an unprimeable number, because it can be changed into a prime (121604521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16452 + ... + 22668.

It is an arithmetic number, because the mean of its divisors is an integer number (5736105).

Almost surely, 2^121604520 is an apocalyptic number.

121604520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121604520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183555360).

121604520 is an abundant number, since it is smaller than the sum of its proper divisors (245506200).

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

121604520 is a wasteful number, since it uses less digits than its factorization.

121604520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394 (or 6390 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121604520 is about 11027.4439468083. The cubic root of 121604520 is about 495.4310702648.

The spelling of 121604520 in words is "one hundred twenty-one million, six hundred four thousand, five hundred twenty".