12307513 has 4 divisors (see below), whose sum is σ = 12731940. Its totient is φ = 11883088.

The previous prime is 12307499. The next prime is 12307567. The reversal of 12307513 is 31570321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31570321 = 379 ⋅83299.

It can be written as a sum of positive squares in 2 ways, for example, as 6775609 + 5531904 = 2603^2 + 2352^2 .

It is a cyclic number.

It is not a de Polignac number, because 12307513 - 2⁵ = 12307481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12307013) 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, 212170 + ... + 212227.

It is an arithmetic number, because the mean of its divisors is an integer number (3182985).

Almost surely, 2^12307513 is an apocalyptic number.

It is an amenable number.

12307513 is a deficient number, since it is larger than the sum of its proper divisors (424427).

12307513 is an equidigital number, since it uses as much as digits as its factorization.

12307513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424426.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 12307513 is about 3508.2065218570. The cubic root of 12307513 is about 230.8820134212.

Adding to 12307513 its reverse (31570321), we get a palindrome (43877834).

The spelling of 12307513 in words is "twelve million, three hundred seven thousand, five hundred thirteen".