12712757 has 4 divisors (see below), whose sum is σ = 12733536. Its totient is φ = 12691980.

The previous prime is 12712751. The next prime is 12712783. The reversal of 12712757 is 75721721.

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 not a de Polignac number, because 12712757 - 2⁴ = 12712741 is a prime.

It is a super-2 number, since 2×12712757² = 323228381082098, 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 (12712751) 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, 9443 + ... + 10704.

It is an arithmetic number, because the mean of its divisors is an integer number (3183384).

Almost surely, 2^12712757 is an apocalyptic number.

It is an amenable number.

12712757 is a deficient number, since it is larger than the sum of its proper divisors (20779).

12712757 is an equidigital number, since it uses as much as digits as its factorization.

12712757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778.

The product of its digits is 6860, while the sum is 32.

The square root of 12712757 is about 3565.4953372568. The cubic root of 12712757 is about 233.3887485162.

The spelling of 12712757 in words is "twelve million, seven hundred twelve thousand, seven hundred fifty-seven".