12641881 has 16 divisors (see below), whose sum is σ = 15185664. Its totient is φ = 10289664.

The previous prime is 12641869. The next prime is 12641917. The reversal of 12641881 is 18814621.

It is not a de Polignac number, because 12641881 - 2¹¹ = 12639833 is a prime.

It is a super-2 number, since 2×12641881² = 319634310436322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37345 + ... + 37681.

It is an arithmetic number, because the mean of its divisors is an integer number (949104).

Almost surely, 2^12641881 is an apocalyptic number.

It is an amenable number.

12641881 is a deficient number, since it is larger than the sum of its proper divisors (2543783).

12641881 is a wasteful number, since it uses less digits than its factorization.

12641881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 3072, while the sum is 31.

The square root of 12641881 is about 3555.5422933780. The cubic root of 12641881 is about 232.9542113170.

The spelling of 12641881 in words is "twelve million, six hundred forty-one thousand, eight hundred eighty-one".