12516720 has 40 divisors (see below), whose sum is σ = 38802576. Its totient is φ = 3337728.

The previous prime is 12516703. The next prime is 12516737. The reversal of 12516720 is 2761521.

It is an interprime number because it is at equal distance from previous prime (12516703) and next prime (12516737).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25837 + ... + 26316.

Almost surely, 2^12516720 is an apocalyptic number.

12516720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12516720 is an abundant number, since it is smaller than the sum of its proper divisors (26285856).

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

12516720 is a wasteful number, since it uses less digits than its factorization.

12516720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52169 (or 52163 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12516720 is about 3537.8976808268. The cubic root of 12516720 is about 232.1828720652.

The spelling of 12516720 in words is "twelve million, five hundred sixteen thousand, seven hundred twenty".