12649441 has 4 divisors (see below), whose sum is σ = 14456512. Its totient is φ = 10842372.

The previous prime is 12649409. The next prime is 12649447. The reversal of 12649441 is 14494621.

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 not a de Polignac number, because 12649441 - 2⁵ = 12649409 is a prime.

It is a super-2 number, since 2×12649441² = 320016715224962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12649447) 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, 903525 + ... + 903538.

It is an arithmetic number, because the mean of its divisors is an integer number (3614128).

Almost surely, 2^12649441 is an apocalyptic number.

It is an amenable number.

12649441 is a deficient number, since it is larger than the sum of its proper divisors (1807071).

12649441 is an equidigital number, since it uses as much as digits as its factorization.

12649441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807070.

The product of its digits is 6912, while the sum is 31.

The square root of 12649441 is about 3556.6052634500. The cubic root of 12649441 is about 233.0006385561. Note that the first 3 decimals are identical.

The spelling of 12649441 in words is "twelve million, six hundred forty-nine thousand, four hundred forty-one".