61443725 has 24 divisors (see below), whose sum is σ = 87375360. Its totient is φ = 41987520.

The previous prime is 61443703. The next prime is 61443727. The reversal of 61443725 is 52734416.

It is not a de Polignac number, because 61443725 - 2⁸ = 61443469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61443691 and 61443700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61443727) 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, 83459 + ... + 84191.

It is an arithmetic number, because the mean of its divisors is an integer number (3640640).

Almost surely, 2^61443725 is an apocalyptic number.

It is an amenable number.

61443725 is a deficient number, since it is larger than the sum of its proper divisors (25931635).

61443725 is a wasteful number, since it uses less digits than its factorization.

61443725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1224 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 61443725 is about 7838.6047865676. The cubic root of 61443725 is about 394.6019062456.

The spelling of 61443725 in words is "sixty-one million, four hundred forty-three thousand, seven hundred twenty-five".