12487857 has 8 divisors (see below), whose sum is σ = 16837920. Its totient is φ = 8231520.

The previous prime is 12487841. The next prime is 12487861. The reversal of 12487857 is 75878421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12487857 - 2⁴ = 12487841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12487357) 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 7 ways as a sum of consecutive naturals, for example, 23119 + ... + 23652.

It is an arithmetic number, because the mean of its divisors is an integer number (2104740).

Almost surely, 2^12487857 is an apocalyptic number.

It is an amenable number.

12487857 is a deficient number, since it is larger than the sum of its proper divisors (4350063).

12487857 is an equidigital number, since it uses as much as digits as its factorization.

12487857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46863.

The product of its digits is 125440, while the sum is 42.

The square root of 12487857 is about 3533.8162091427. The cubic root of 12487857 is about 232.0042669152.

The spelling of 12487857 in words is "twelve million, four hundred eighty-seven thousand, eight hundred fifty-seven".