12387957 has 4 divisors (see below), whose sum is σ = 16517280. Its totient is φ = 8258636.

The previous prime is 12387937. The next prime is 12387971. The reversal of 12387957 is 75978321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12387957 - 2⁸ = 12387701 is a prime.

It is a super-2 number, since 2×12387957² = 306922957267698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064657 + ... + 2064662.

It is an arithmetic number, because the mean of its divisors is an integer number (4129320).

Almost surely, 2^12387957 is an apocalyptic number.

It is an amenable number.

12387957 is a deficient number, since it is larger than the sum of its proper divisors (4129323).

12387957 is an equidigital number, since it uses as much as digits as its factorization.

12387957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129322.

The product of its digits is 105840, while the sum is 42.

The square root of 12387957 is about 3519.6529658476. The cubic root of 12387957 is about 231.3839494717.

The spelling of 12387957 in words is "twelve million, three hundred eighty-seven thousand, nine hundred fifty-seven".