12500557 has 4 divisors (see below), whose sum is σ = 12533920. Its totient is φ = 12467196.

The previous prime is 12500549. The next prime is 12500581. The reversal of 12500557 is 75500521.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12500557 - 2³ = 12500549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500597) 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, 16113 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (3133480).

Almost surely, 2^12500557 is an apocalyptic number.

It is an amenable number.

12500557 is a deficient number, since it is larger than the sum of its proper divisors (33363).

12500557 is an equidigital number, since it uses as much as digits as its factorization.

12500557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33362.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 12500557 is about 3535.6126767507. The cubic root of 12500557 is about 232.0828887827.

The spelling of 12500557 in words is "twelve million, five hundred thousand, five hundred fifty-seven".