12557198 has 8 divisors (see below), whose sum is σ = 18908208. Its totient is φ = 6254464.

The previous prime is 12557197. The next prime is 12557213. The reversal of 12557198 is 89175521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12557198² = 315366443222408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557191) 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, 11411 + ... + 12462.

It is an arithmetic number, because the mean of its divisors is an integer number (2363526).

Almost surely, 2^12557198 is an apocalyptic number.

12557198 is a deficient number, since it is larger than the sum of its proper divisors (6351010).

12557198 is a wasteful number, since it uses less digits than its factorization.

12557198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24138.

The product of its digits is 25200, while the sum is 38.

The square root of 12557198 is about 3543.6136922639. The cubic root of 12557198 is about 232.4328892519.

The spelling of 12557198 in words is "twelve million, five hundred fifty-seven thousand, one hundred ninety-eight".