61724925 has 18 divisors (see below), whose sum is σ = 110556602. Its totient is φ = 32919840.

The previous prime is 61724911. The next prime is 61724933. The reversal of 61724925 is 52942716.

It can be written as a sum of positive squares in 3 ways, for example, as 17489124 + 44235801 = 4182^2 + 6651^2 .

It is not a de Polignac number, because 61724925 - 2⁸ = 61724669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61724925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 136942 + ... + 137391.

Almost surely, 2^61724925 is an apocalyptic number.

It is an amenable number.

61724925 is a deficient number, since it is larger than the sum of its proper divisors (48831677).

61724925 is a wasteful number, since it uses less digits than its factorization.

61724925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274349 (or 274341 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61724925 is about 7856.5211767041. The cubic root of 61724925 is about 395.2029614432.

The spelling of 61724925 in words is "sixty-one million, seven hundred twenty-four thousand, nine hundred twenty-five".