12312761 has 4 divisors (see below), whose sum is σ = 12321024. Its totient is φ = 12304500.

The previous prime is 12312737. The next prime is 12312763. The reversal of 12312761 is 16721321.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16721321 = 1087 ⋅15383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12312761 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12312763) 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, 1205 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (3080256).

Almost surely, 2^12312761 is an apocalyptic number.

It is an amenable number.

12312761 is a deficient number, since it is larger than the sum of its proper divisors (8263).

12312761 is an equidigital number, since it uses as much as digits as its factorization.

12312761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8262.

The product of its digits is 504, while the sum is 23.

The square root of 12312761 is about 3508.9544026676. The cubic root of 12312761 is about 230.9148252662.

The spelling of 12312761 in words is "twelve million, three hundred twelve thousand, seven hundred sixty-one".