12499881 has 8 divisors (see below), whose sum is σ = 16689024. Its totient is φ = 8322000.

The previous prime is 12499873. The next prime is 12499897. The reversal of 12499881 is 18899421.

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

It is not a de Polignac number, because 12499881 - 2³ = 12499873 is a prime.

It is a super-2 number, since 2×12499881² = 312494050028322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12499801) 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, 256 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (2086128).

Almost surely, 2^12499881 is an apocalyptic number.

It is an amenable number.

12499881 is a deficient number, since it is larger than the sum of its proper divisors (4189143).

12499881 is an equidigital number, since it uses as much as digits as its factorization.

12499881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631.

The product of its digits is 41472, while the sum is 42.

The square root of 12499881 is about 3535.5170767513. The cubic root of 12499881 is about 232.0787052129.

The spelling of 12499881 in words is "twelve million, four hundred ninety-nine thousand, eight hundred eighty-one".