61291725 has 24 divisors (see below), whose sum is σ = 110549472. Its totient is φ = 29716800.

The previous prime is 61291697. The next prime is 61291751. The reversal of 61291725 is 52719216.

It is not a de Polignac number, because 61291725 - 2⁶ = 61291661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36322 + ... + 37971.

It is an arithmetic number, because the mean of its divisors is an integer number (4606228).

Almost surely, 2^61291725 is an apocalyptic number.

It is an amenable number.

61291725 is a deficient number, since it is larger than the sum of its proper divisors (49257747).

61291725 is a wasteful number, since it uses less digits than its factorization.

61291725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74317 (or 74312 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 61291725 is about 7828.9031798841. The cubic root of 61291725 is about 394.2762477286.

The spelling of 61291725 in words is "sixty-one million, two hundred ninety-one thousand, seven hundred twenty-five".