12905613 has 24 divisors (see below), whose sum is σ = 21485568. Its totient is φ = 7312032.

The previous prime is 12905603. The next prime is 12905639. The reversal of 12905613 is 31650921.

12905613 is a `hidden beast` number, since 12 + 90 + 561 + 3 = 666.

12905613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12905613 - 2⁶ = 12905549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905603) 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, 7195 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (895232).

Almost surely, 2^12905613 is an apocalyptic number.

It is an amenable number.

12905613 is a deficient number, since it is larger than the sum of its proper divisors (8579955).

12905613 is a wasteful number, since it uses less digits than its factorization.

12905613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12905613 is about 3592.4383084473. The cubic root of 12905613 is about 234.5630207520.

It can be divided in two parts, 1290 and 5613, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 12905613 in words is "twelve million, nine hundred five thousand, six hundred thirteen".