12312567 has 24 divisors (see below), whose sum is σ = 19254144. Its totient is φ = 7847928.

The previous prime is 12312557. The next prime is 12312571. The reversal of 12312567 is 76521321.

It is a happy number.

It is not a de Polignac number, because 12312567 - 2⁷ = 12312439 is a prime.

It is a super-2 number, since 2×12312567² = 303198612258978, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12312567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4488 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (802256).

Almost surely, 2^12312567 is an apocalyptic number.

12312567 is a deficient number, since it is larger than the sum of its proper divisors (6941577).

12312567 is an equidigital number, since it uses as much as digits as its factorization.

12312567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241 (or 2229 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12312567 is about 3508.9267589963. The cubic root of 12312567 is about 230.9136124943.

Adding to 12312567 its reverse (76521321), we get a palindrome (88833888).

The spelling of 12312567 in words is "twelve million, three hundred twelve thousand, five hundred sixty-seven".