61312725 has 36 divisors (see below), whose sum is σ = 110260800. Its totient is φ = 32568480.

The previous prime is 61312721. The next prime is 61312729. The reversal of 61312725 is 52721316.

It is a happy number.

61312725 is a `hidden beast` number, since 613 + 1 + 27 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (61312721) and next prime (61312729).

It is not a de Polignac number, because 61312725 - 2² = 61312721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61312721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84916 + ... + 85634.

It is an arithmetic number, because the mean of its divisors is an integer number (3062800).

Almost surely, 2^61312725 is an apocalyptic number.

It is an amenable number.

61312725 is a deficient number, since it is larger than the sum of its proper divisors (48948075).

61312725 is a wasteful number, since it uses less digits than its factorization.

61312725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 1106 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 61312725 is about 7830.2442490640. The cubic root of 61312725 is about 394.3212720543.

The spelling of 61312725 in words is "sixty-one million, three hundred twelve thousand, seven hundred twenty-five".