12887157 has 4 divisors (see below), whose sum is σ = 17182880. Its totient is φ = 8591436.

The previous prime is 12887131. The next prime is 12887167. The reversal of 12887157 is 75178821.

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 not a de Polignac number, because 12887157 - 2⁷ = 12887029 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 (12887117) 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, 2147857 + ... + 2147862.

It is an arithmetic number, because the mean of its divisors is an integer number (4295720).

Almost surely, 2^12887157 is an apocalyptic number.

It is an amenable number.

12887157 is a deficient number, since it is larger than the sum of its proper divisors (4295723).

12887157 is an equidigital number, since it uses as much as digits as its factorization.

12887157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295722.

The product of its digits is 31360, while the sum is 39.

The square root of 12887157 is about 3589.8686605501. The cubic root of 12887157 is about 234.4511531381.

The spelling of 12887157 in words is "twelve million, eight hundred eighty-seven thousand, one hundred fifty-seven".