61256025 has 18 divisors (see below), whose sum is σ = 109716750. Its totient is φ = 32669760.

The previous prime is 61256021. The next prime is 61256029. The reversal of 61256025 is 52065216.

It is an interprime number because it is at equal distance from previous prime (61256021) and next prime (61256029).

It can be written as a sum of positive squares in 3 ways, for example, as 17338896 + 43917129 = 4164^2 + 6627^2 .

It is not a de Polignac number, because 61256025 - 2² = 61256021 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61256025.

It is not an unprimeable number, because it can be changed into a prime (61256021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 135900 + ... + 136349.

It is an arithmetic number, because the mean of its divisors is an integer number (6095375).

Almost surely, 2^61256025 is an apocalyptic number.

It is an amenable number.

61256025 is a deficient number, since it is larger than the sum of its proper divisors (48460725).

61256025 is a wasteful number, since it uses less digits than its factorization.

61256025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272265 (or 272257 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 61256025 is about 7826.6228349142. The cubic root of 61256025 is about 394.1996827667.

The spelling of 61256025 in words is "sixty-one million, two hundred fifty-six thousand, twenty-five".