12156507 has 36 divisors (see below), whose sum is σ = 20125560. Its totient is φ = 7246800.

The previous prime is 12156499. The next prime is 12156509. The reversal of 12156507 is 70565121.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12156507 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 650 + 7 = 666.

It is not a de Polignac number, because 12156507 - 2³ = 12156499 is a prime.

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

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

It is not an unprimeable number, because it can be changed into a prime (12156509) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 199257 + ... + 199317.

Almost surely, 2^12156507 is an apocalyptic number.

12156507 is a deficient number, since it is larger than the sum of its proper divisors (7969053).

12156507 is an equidigital number, since it uses as much as digits as its factorization.

12156507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 75 counting only the distinct ones).

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

The square root of 12156507 is about 3486.6182756361. The cubic root of 12156507 is about 229.9338625212.

Multiplying 12156507 by its sum of digits (27), we get a square (328225689 = 18117²).

12156507 divided by its sum of digits (27) gives a square (450241 = 671²).

The spelling of 12156507 in words is "twelve million, one hundred fifty-six thousand, five hundred seven".