12540613 has 4 divisors (see below), whose sum is σ = 12548448. Its totient is φ = 12532780.

The previous prime is 12540607. The next prime is 12540623. The reversal of 12540613 is 31604521.

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.

It is a cyclic number.

It is not a de Polignac number, because 12540613 - 2⁵ = 12540581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540623) 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, 553 + ... + 5038.

It is an arithmetic number, because the mean of its divisors is an integer number (3137112).

Almost surely, 2^12540613 is an apocalyptic number.

It is an amenable number.

12540613 is a deficient number, since it is larger than the sum of its proper divisors (7835).

12540613 is an equidigital number, since it uses as much as digits as its factorization.

12540613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7834.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12540613 is about 3541.2727937847. The cubic root of 12540613 is about 232.3305150905.

The spelling of 12540613 in words is "twelve million, five hundred forty thousand, six hundred thirteen".