12557605 has 4 divisors (see below), whose sum is σ = 15069132. Its totient is φ = 10046080.

The previous prime is 12557593. The next prime is 12557641. The reversal of 12557605 is 50675521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1361889 + 11195716 = 1167^2 + 3346^2 .

It is not a de Polignac number, because 12557605 - 2⁹ = 12557093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255756 + ... + 1255765.

It is an arithmetic number, because the mean of its divisors is an integer number (3767283).

Almost surely, 2^12557605 is an apocalyptic number.

It is an amenable number.

12557605 is a deficient number, since it is larger than the sum of its proper divisors (2511527).

12557605 is an equidigital number, since it uses as much as digits as its factorization.

12557605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511526.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 12557605 is about 3543.6711190515. The cubic root of 12557605 is about 232.4354004056.

The spelling of 12557605 in words is "twelve million, five hundred fifty-seven thousand, six hundred five".