12862257 has 4 divisors (see below), whose sum is σ = 17149680. Its totient is φ = 8574836.

The previous prime is 12862253. The next prime is 12862301. The reversal of 12862257 is 75226821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75226821 = 3 ⋅25075607.

It is a cyclic number.

It is not a de Polignac number, because 12862257 - 2² = 12862253 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12862253) 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, 2143707 + ... + 2143712.

It is an arithmetic number, because the mean of its divisors is an integer number (4287420).

Almost surely, 2^12862257 is an apocalyptic number.

It is an amenable number.

12862257 is a deficient number, since it is larger than the sum of its proper divisors (4287423).

12862257 is an equidigital number, since it uses as much as digits as its factorization.

12862257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287422.

The product of its digits is 13440, while the sum is 33.

The square root of 12862257 is about 3586.3988902519. The cubic root of 12862257 is about 234.3000570346.

The spelling of 12862257 in words is "twelve million, eight hundred sixty-two thousand, two hundred fifty-seven".