12433257 has 40 divisors (see below), whose sum is σ = 19747200. Its totient is φ = 7783776.

The previous prime is 12433249. The next prime is 12433283. The reversal of 12433257 is 75233421.

It is not a de Polignac number, because 12433257 - 2³ = 12433249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12433257.

It is not an unprimeable number, because it can be changed into a prime (12433237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 157344 + ... + 157422.

It is an arithmetic number, because the mean of its divisors is an integer number (493680).

Almost surely, 2^12433257 is an apocalyptic number.

It is an amenable number.

12433257 is a deficient number, since it is larger than the sum of its proper divisors (7313943).

12433257 is an equidigital number, since it uses as much as digits as its factorization.

12433257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 178 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 12433257 is about 3526.0823870125. The cubic root of 12433257 is about 231.6656462411.

Adding to 12433257 its reverse (75233421), we get a palindrome (87666678).

The spelling of 12433257 in words is "twelve million, four hundred thirty-three thousand, two hundred fifty-seven".