12157506 has 32 divisors (see below), whose sum is σ = 27216000. Its totient is φ = 4022640.

The previous prime is 12157469. The next prime is 12157553. The reversal of 12157506 is 60575121.

12157506 is a `hidden beast` number, since 1 + 2 + 157 + 506 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12157506.

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, 7291 + ... + 8801.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^12157506 is an apocalyptic number.

12157506 is an abundant number, since it is smaller than the sum of its proper divisors (15058494).

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

12157506 is a wasteful number, since it uses less digits than its factorization.

12157506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1665 counting only the distinct ones).

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

The square root of 12157506 is about 3486.7615347196. The cubic root of 12157506 is about 229.9401608665.

The spelling of 12157506 in words is "twelve million, one hundred fifty-seven thousand, five hundred six".