121057506 has 48 divisors (see below), whose sum is σ = 267878520. Its totient is φ = 39502080.

The previous prime is 121057501. The next prime is 121057529. The reversal of 121057506 is 605750121.

It can be written as a sum of positive squares in 4 ways, for example, as 90155025 + 30902481 = 9495^2 + 5559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121057506.

It is not an unprimeable number, because it can be changed into a prime (121057501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237580 + ... + 238088.

Almost surely, 2^121057506 is an apocalyptic number.

121057506 is an abundant number, since it is smaller than the sum of its proper divisors (146821014).

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

121057506 is a wasteful number, since it uses less digits than its factorization.

121057506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 121057506 is about 11002.6135985956. The cubic root of 121057506 is about 494.6870872057.

The spelling of 121057506 in words is "one hundred twenty-one million, fifty-seven thousand, five hundred six".