12531416 has 8 divisors (see below), whose sum is σ = 23496420. Its totient is φ = 6265704.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531416 is 61413521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12531391 and 12531400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783206 + ... + 783221.

Almost surely, 2^12531416 is an apocalyptic number.

It is an amenable number.

12531416 is a deficient number, since it is larger than the sum of its proper divisors (10965004).

12531416 is a wasteful number, since it uses less digits than its factorization.

12531416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566433 (or 1566429 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 12531416 is about 3539.9740112040. The cubic root of 12531416 is about 232.2737058977.

Adding to 12531416 its reverse (61413521), we get a palindrome (73944937).

The spelling of 12531416 in words is "twelve million, five hundred thirty-one thousand, four hundred sixteen".