12720725 has 12 divisors (see below), whose sum is σ = 16460256. Its totient is φ = 9733680.

The previous prime is 12720713. The next prime is 12720737. The reversal of 12720725 is 52702721.

It is an interprime number because it is at equal distance from previous prime (12720713) and next prime (12720737).

It is not a de Polignac number, because 12720725 - 2¹⁸ = 12458581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12720694 and 12720703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10487 + ... + 11636.

It is an arithmetic number, because the mean of its divisors is an integer number (1371688).

Almost surely, 2^12720725 is an apocalyptic number.

It is an amenable number.

12720725 is a deficient number, since it is larger than the sum of its proper divisors (3739531).

12720725 is a wasteful number, since it uses less digits than its factorization.

12720725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22156 (or 22151 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 12720725 is about 3566.6125385301. The cubic root of 12720725 is about 233.4374988426.

The spelling of 12720725 in words is "twelve million, seven hundred twenty thousand, seven hundred twenty-five".