12157047 has 36 divisors (see below), whose sum is σ = 21204456. Its totient is φ = 6940080.

The previous prime is 12157039. The next prime is 12157049. The reversal of 12157047 is 74075121.

12157047 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12157047 - 2³ = 12157039 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12157047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157049) 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, 11397 + ... + 12417.

Almost surely, 2^12157047 is an apocalyptic number.

12157047 is a deficient number, since it is larger than the sum of its proper divisors (9047409).

12157047 is an equidigital number, since it uses as much as digits as its factorization.

12157047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 12157047 is about 3486.6957137095. The cubic root of 12157047 is about 229.9372670750.

The spelling of 12157047 in words is "twelve million, one hundred fifty-seven thousand, forty-seven".