61415725 has 12 divisors (see below), whose sum is σ = 87035104. Its totient is φ = 42113520.

The previous prime is 61415719. The next prime is 61415737. The reversal of 61415725 is 52751416.

It is not a de Polignac number, because 61415725 - 2⁵ = 61415693 is a prime.

It is a Duffinian number.

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, 175299 + ... + 175648.

Almost surely, 2^61415725 is an apocalyptic number.

It is an amenable number.

61415725 is a deficient number, since it is larger than the sum of its proper divisors (25619379).

61415725 is a wasteful number, since it uses less digits than its factorization.

61415725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350964 (or 350959 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 61415725 is about 7836.8185509172. The cubic root of 61415725 is about 394.5419569064.

The spelling of 61415725 in words is "sixty-one million, four hundred fifteen thousand, seven hundred twenty-five".