12645613 has 4 divisors (see below), whose sum is σ = 13053568. Its totient is φ = 12237660.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645613 is 31654621.

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 a de Polignac number, because none of the positive numbers 2^k-12645613 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 (12645623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203931 + ... + 203992.

It is an arithmetic number, because the mean of its divisors is an integer number (3263392).

Almost surely, 2^12645613 is an apocalyptic number.

It is an amenable number.

12645613 is a deficient number, since it is larger than the sum of its proper divisors (407955).

12645613 is an equidigital number, since it uses as much as digits as its factorization.

12645613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407954.

The product of its digits is 4320, while the sum is 28.

The square root of 12645613 is about 3556.0670691088. The cubic root of 12645613 is about 232.9771324730.

The spelling of 12645613 in words is "twelve million, six hundred forty-five thousand, six hundred thirteen".