12826657 has 4 divisors (see below), whose sum is σ = 12834580. Its totient is φ = 12818736.

The previous prime is 12826651. The next prime is 12826669. The reversal of 12826657 is 75662821.

It is a happy number.

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 can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 8156736 = 2161^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12826657 - 2¹⁵ = 12793889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12826651) 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, 558 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (3208645).

Almost surely, 2^12826657 is an apocalyptic number.

It is an amenable number.

12826657 is a deficient number, since it is larger than the sum of its proper divisors (7923).

12826657 is an equidigital number, since it uses as much as digits as its factorization.

12826657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922.

The product of its digits is 40320, while the sum is 37.

The square root of 12826657 is about 3581.4322553973. The cubic root of 12826657 is about 234.0836930032.

The spelling of 12826657 in words is "twelve million, eight hundred twenty-six thousand, six hundred fifty-seven".