12745431 has 10 divisors (see below), whose sum is σ = 19039592. Its totient is φ = 8496900.

The previous prime is 12745399. The next prime is 12745483. The reversal of 12745431 is 13454721.

It is not a de Polignac number, because 12745431 - 2⁵ = 12745399 is a prime.

It is a super-3 number, since 3×12745431³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12745395 and 12745404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12745331) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78595 + ... + 78756.

Almost surely, 2^12745431 is an apocalyptic number.

12745431 is a deficient number, since it is larger than the sum of its proper divisors (6294161).

12745431 is an equidigital number, since it uses as much as digits as its factorization.

12745431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157363 (or 157354 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12745431 is about 3570.0743689733. The cubic root of 12745431 is about 233.5885273714.

The spelling of 12745431 in words is "twelve million, seven hundred forty-five thousand, four hundred thirty-one".