12899520 has 112 divisors (see below), whose sum is σ = 45537120. Its totient is φ = 3437568.

The previous prime is 12899507. The next prime is 12899531. The reversal of 12899520 is 2599821.

12899520 is a `hidden beast` number, since 128 + 9 + 9 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 7894 + ... + 9386.

Almost surely, 2^12899520 is an apocalyptic number.

12899520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22768560).

12899520 is an abundant number, since it is smaller than the sum of its proper divisors (32637600).

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

12899520 is a wasteful number, since it uses less digits than its factorization.

12899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 12899520 is about 3591.5901770664. The cubic root of 12899520 is about 234.5261009647.

The spelling of 12899520 in words is "twelve million, eight hundred ninety-nine thousand, five hundred twenty".