12756493 has 4 divisors (see below), whose sum is σ = 12781408. Its totient is φ = 12731580.

The previous prime is 12756487. The next prime is 12756521. The reversal of 12756493 is 39465721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12756493 is a prime.

It is a super-2 number, since 2×12756493² = 325456227318098, 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 (12756413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11673 + ... + 12718.

It is an arithmetic number, because the mean of its divisors is an integer number (3195352).

Almost surely, 2^12756493 is an apocalyptic number.

It is an amenable number.

12756493 is a deficient number, since it is larger than the sum of its proper divisors (24915).

12756493 is an equidigital number, since it uses as much as digits as its factorization.

12756493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24914.

The product of its digits is 45360, while the sum is 37.

The square root of 12756493 is about 3571.6233004056. The cubic root of 12756493 is about 233.6560864597.

The spelling of 12756493 in words is "twelve million, seven hundred fifty-six thousand, four hundred ninety-three".