12951157 has 4 divisors (see below), whose sum is σ = 12959596. Its totient is φ = 12942720.

The previous prime is 12951151. The next prime is 12951163. The reversal of 12951157 is 75115921.

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.

It is an interprime number because it is at equal distance from previous prime (12951151) and next prime (12951163).

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 5503716 = 2729^2 + 2346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12951157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12951151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194 + ... + 5227.

It is an arithmetic number, because the mean of its divisors is an integer number (3239899).

Almost surely, 2^12951157 is an apocalyptic number.

It is an amenable number.

12951157 is a deficient number, since it is larger than the sum of its proper divisors (8439).

12951157 is an equidigital number, since it uses as much as digits as its factorization.

12951157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438.

The product of its digits is 3150, while the sum is 31.

The square root of 12951157 is about 3598.7715959755. The cubic root of 12951157 is about 234.8386216624.

The spelling of 12951157 in words is "twelve million, nine hundred fifty-one thousand, one hundred fifty-seven".