12645491 has 8 divisors (see below), whose sum is σ = 13034304. Its totient is φ = 12261760.

The previous prime is 12645487. The next prime is 12645497. The reversal of 12645491 is 19454621.

12645491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12645491 - 2² = 12645487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (1629288).

Almost surely, 2^12645491 is an apocalyptic number.

12645491 is a deficient number, since it is larger than the sum of its proper divisors (388813).

12645491 is a wasteful number, since it uses less digits than its factorization.

12645491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541.

The product of its digits is 8640, while the sum is 32.

The square root of 12645491 is about 3556.0499152852. The cubic root of 12645491 is about 232.9763832461.

The spelling of 12645491 in words is "twelve million, six hundred forty-five thousand, four hundred ninety-one".