61381725 has 24 divisors (see below), whose sum is σ = 102127392. Its totient is φ = 32529600.

The previous prime is 61381711. The next prime is 61381729. The reversal of 61381725 is 52718316.

It is not a de Polignac number, because 61381725 - 2⁵ = 61381693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61381729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9715 + ... + 14735.

It is an arithmetic number, because the mean of its divisors is an integer number (4255308).

Almost surely, 2^61381725 is an apocalyptic number.

It is an amenable number.

61381725 is a deficient number, since it is larger than the sum of its proper divisors (40745667).

61381725 is a wasteful number, since it uses less digits than its factorization.

61381725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197 (or 5192 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 61381725 is about 7834.6490029867. The cubic root of 61381725 is about 394.4691367792.

The spelling of 61381725 in words is "sixty-one million, three hundred eighty-one thousand, seven hundred twenty-five".