12861508 has 48 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 5482400.

The previous prime is 12861493. The next prime is 12861517. The reversal of 12861508 is 80516821.

It is a self number, because there is not a number n which added to its sum of digits gives 12861508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71763 + ... + 71941.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^12861508 is an apocalyptic number.

It is an amenable number.

12861508 is an abundant number, since it is smaller than the sum of its proper divisors (13265852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12861508 is a wasteful number, since it uses less digits than its factorization.

12861508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12861508 is about 3586.2944664375. The cubic root of 12861508 is about 234.2955089953.

The spelling of 12861508 in words is "twelve million, eight hundred sixty-one thousand, five hundred eight".