12157700 has 18 divisors (see below), whose sum is σ = 26382426. Its totient is φ = 4863040.

The previous prime is 12157697. The next prime is 12157711. The reversal of 12157700 is 775121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 158404 + 11999296 = 398^2 + 3464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60689 + ... + 60888.

Almost surely, 2^12157700 is an apocalyptic number.

12157700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12157700 is an abundant number, since it is smaller than the sum of its proper divisors (14224726).

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

12157700 is a wasteful number, since it uses less digits than its factorization.

12157700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121591 (or 121584 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 12157700 is about 3486.7893541193. The cubic root of 12157700 is about 229.9413839286.

The spelling of 12157700 in words is "twelve million, one hundred fifty-seven thousand, seven hundred".