12505720 has 16 divisors (see below), whose sum is σ = 28137960. Its totient is φ = 5002272.

The previous prime is 12505711. The next prime is 12505723. The reversal of 12505720 is 2750521.

It is a junction number, because it is equal to n+sod(n) for n = 12505691 and 12505700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156282 + ... + 156361.

Almost surely, 2^12505720 is an apocalyptic number.

12505720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12505720 is an abundant number, since it is smaller than the sum of its proper divisors (15632240).

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

12505720 is a wasteful number, since it uses less digits than its factorization.

12505720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312654 (or 312650 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 12505720 is about 3536.3427435700. The cubic root of 12505720 is about 232.1148361332.

It can be divided in two parts, 12505 and 720, that added together give a square (13225 = 115²).

The spelling of 12505720 in words is "twelve million, five hundred five thousand, seven hundred twenty".