12877857 has 24 divisors (see below), whose sum is σ = 19982664. Its totient is φ = 7962624.

The previous prime is 12877847. The next prime is 12877883. The reversal of 12877857 is 75877821.

It can be written as a sum of positive squares in 4 ways, for example, as 5716881 + 7160976 = 2391^2 + 2676^2 .

It is not a de Polignac number, because 12877857 - 2¹⁰ = 12876833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12877807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10593 + ... + 11745.

It is an arithmetic number, because the mean of its divisors is an integer number (832611).

Almost surely, 2^12877857 is an apocalyptic number.

12877857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12877857 is a deficient number, since it is larger than the sum of its proper divisors (7104807).

12877857 is a wasteful number, since it uses less digits than its factorization.

12877857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1246 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 12877857 is about 3588.5731147630. The cubic root of 12877857 is about 234.3947424436.

The spelling of 12877857 in words is "twelve million, eight hundred seventy-seven thousand, eight hundred fifty-seven".