12531422 has 16 divisors (see below), whose sum is σ = 19863360. Its totient is φ = 5919648.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531422 is 22413521.

It is a junction number, because it is equal to n+sod(n) for n = 12531394 and 12531403.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 428 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^12531422 is an apocalyptic number.

12531422 is a deficient number, since it is larger than the sum of its proper divisors (7331938).

12531422 is a wasteful number, since it uses less digits than its factorization.

12531422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675.

The product of its digits is 480, while the sum is 20.

The square root of 12531422 is about 3539.9748586678. The cubic root of 12531422 is about 232.2737429683.

Adding to 12531422 its reverse (22413521), we get a palindrome (34944943).

The spelling of 12531422 in words is "twelve million, five hundred thirty-one thousand, four hundred twenty-two".