12757431 has 4 divisors (see below), whose sum is σ = 17009912. Its totient is φ = 8504952.

The previous prime is 12757421. The next prime is 12757439. The reversal of 12757431 is 13475721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12757431 - 2¹¹ = 12755383 is a prime.

It is a super-2 number, since 2×12757431² = 325504091439522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12757439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126236 + ... + 2126241.

It is an arithmetic number, because the mean of its divisors is an integer number (4252478).

Almost surely, 2^12757431 is an apocalyptic number.

12757431 is a deficient number, since it is larger than the sum of its proper divisors (4252481).

12757431 is an equidigital number, since it uses as much as digits as its factorization.

12757431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252480.

The product of its digits is 5880, while the sum is 30.

The square root of 12757431 is about 3571.7546108320. The cubic root of 12757431 is about 233.6618133220.

The spelling of 12757431 in words is "twelve million, seven hundred fifty-seven thousand, four hundred thirty-one".