12198857 has 12 divisors (see below), whose sum is σ = 13506948. Its totient is φ = 11008800.

The previous prime is 12198847. The next prime is 12198859. The reversal of 12198857 is 75889121.

12198857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 11703241 = 704^2 + 3421^2 .

It is not a de Polignac number, because 12198857 - 2⁶ = 12198793 is a prime.

It is a super-2 number, since 2×12198857² = 297624224212898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12198859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21623 + ... + 22179.

It is an arithmetic number, because the mean of its divisors is an integer number (1125579).

Almost surely, 2^12198857 is an apocalyptic number.

It is an amenable number.

12198857 is a deficient number, since it is larger than the sum of its proper divisors (1308091).

12198857 is a wasteful number, since it uses less digits than its factorization.

12198857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 749 counting only the distinct ones).

The product of its digits is 40320, while the sum is 41.

The square root of 12198857 is about 3492.6862155081. The cubic root of 12198857 is about 230.2005622969.

The spelling of 12198857 in words is "twelve million, one hundred ninety-eight thousand, eight hundred fifty-seven".