12657371 has 4 divisors (see below), whose sum is σ = 12665112. Its totient is φ = 12649632.

The previous prime is 12657353. The next prime is 12657377. The reversal of 12657371 is 17375621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17375621 = 263 ⋅66067.

It is a cyclic number.

It is not a de Polignac number, because 12657371 - 2²² = 8463067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12657377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350 + ... + 5043.

It is an arithmetic number, because the mean of its divisors is an integer number (3166278).

Almost surely, 2^12657371 is an apocalyptic number.

12657371 is a deficient number, since it is larger than the sum of its proper divisors (7741).

12657371 is an equidigital number, since it uses as much as digits as its factorization.

12657371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740.

The product of its digits is 8820, while the sum is 32.

The square root of 12657371 is about 3557.7199159012. The cubic root of 12657371 is about 233.0493181536.

The spelling of 12657371 in words is "twelve million, six hundred fifty-seven thousand, three hundred seventy-one".