12641633 has 4 divisors (see below), whose sum is σ = 12732720. Its totient is φ = 12550548.

The previous prime is 12641623. The next prime is 12641639. The reversal of 12641633 is 33614621.

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 an emirpimes, since its reverse is a distinct semiprime: 33614621 = 211 ⋅159311.

It is a cyclic number.

It is not a de Polignac number, because 12641633 - 2⁴ = 12641617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641639) 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, 45335 + ... + 45612.

It is an arithmetic number, because the mean of its divisors is an integer number (3183180).

Almost surely, 2^12641633 is an apocalyptic number.

It is an amenable number.

12641633 is a deficient number, since it is larger than the sum of its proper divisors (91087).

12641633 is an equidigital number, since it uses as much as digits as its factorization.

12641633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91086.

The product of its digits is 2592, while the sum is 26.

The square root of 12641633 is about 3555.5074180769. The cubic root of 12641633 is about 232.9526879936.

The spelling of 12641633 in words is "twelve million, six hundred forty-one thousand, six hundred thirty-three".