12881520 has 60 divisors (see below), whose sum is σ = 43262856. Its totient is φ = 3434880.

The previous prime is 12881501. The next prime is 12881521. The reversal of 12881520 is 2518821.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12881521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8226 + ... + 9665.

Almost surely, 2^12881520 is an apocalyptic number.

12881520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12881520 is an abundant number, since it is smaller than the sum of its proper divisors (30381336).

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

12881520 is a wasteful number, since it uses less digits than its factorization.

12881520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17910 (or 17901 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 12881520 is about 3589.0834484587. The cubic root of 12881520 is about 234.4169642193.

The spelling of 12881520 in words is "twelve million, eight hundred eighty-one thousand, five hundred twenty".