12557290 has 64 divisors (see below), whose sum is σ = 25660800. Its totient is φ = 4402944.

The previous prime is 12557257. The next prime is 12557291. The reversal of 12557290 is 9275521.

It is not an unprimeable number, because it can be changed into a prime (12557291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236904 + ... + 236956.

It is an arithmetic number, because the mean of its divisors is an integer number (400950).

It is a vampire number, since it can be written as 2279 ⋅ 5510 (with its own digits).

Almost surely, 2^12557290 is an apocalyptic number.

12557290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12557290 is an abundant number, since it is smaller than the sum of its proper divisors (13103510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12557290 is a wasteful number, since it uses less digits than its factorization.

12557290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 12557290 is about 3543.6266733391. The cubic root of 12557290 is about 232.4334568884.

The spelling of 12557290 in words is "twelve million, five hundred fifty-seven thousand, two hundred ninety".