12998885 has 4 divisors (see below), whose sum is σ = 15598668. Its totient is φ = 10399104.

The previous prime is 12998861. The next prime is 12998903. The reversal of 12998885 is 58889921.

12998885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5303809 + 7695076 = 2303^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 12998885 - 2¹⁸ = 12736741 is a prime.

It is a super-2 number, since 2×12998885² = 337942022486450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299884 + ... + 1299893.

It is an arithmetic number, because the mean of its divisors is an integer number (3899667).

Almost surely, 2^12998885 is an apocalyptic number.

It is an amenable number.

12998885 is a deficient number, since it is larger than the sum of its proper divisors (2599783).

12998885 is an equidigital number, since it uses as much as digits as its factorization.

12998885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599782.

The product of its digits is 414720, while the sum is 50.

The square root of 12998885 is about 3605.3966494687. The cubic root of 12998885 is about 235.1267461743.

The spelling of 12998885 in words is "twelve million, nine hundred ninety-eight thousand, eight hundred eighty-five".