12402231 has 16 divisors (see below), whose sum is σ = 18432000. Its totient is φ = 7371648.

The previous prime is 12402223. The next prime is 12402233. The reversal of 12402231 is 13220421.

It is not a de Polignac number, because 12402231 - 2³ = 12402223 is a prime.

It is a super-2 number, since 2×12402231² = 307630667554722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12402231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5431 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (1152000).

Almost surely, 2^12402231 is an apocalyptic number.

12402231 is a deficient number, since it is larger than the sum of its proper divisors (6029769).

12402231 is a wasteful number, since it uses less digits than its factorization.

12402231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12838.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12402231 is about 3521.6801387974. The cubic root of 12402231 is about 231.4727859325.

Adding to 12402231 its reverse (13220421), we get a palindrome (25622652).

The spelling of 12402231 in words is "twelve million, four hundred two thousand, two hundred thirty-one".