61085025 has 18 divisors (see below), whose sum is σ = 109410470. Its totient is φ = 32578560.

The previous prime is 61084997. The next prime is 61085041. The reversal of 61085025 is 52058016.

It can be written as a sum of positive squares in 3 ways, for example, as 18352656 + 42732369 = 4284^2 + 6537^2 .

It is not a de Polignac number, because 61085025 - 2⁸ = 61084769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61085025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 135520 + ... + 135969.

Almost surely, 2^61085025 is an apocalyptic number.

It is an amenable number.

61085025 is a deficient number, since it is larger than the sum of its proper divisors (48325445).

61085025 is a wasteful number, since it uses less digits than its factorization.

61085025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271505 (or 271497 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 61085025 is about 7815.6909483423. The cubic root of 61085025 is about 393.8325299416.

The spelling of 61085025 in words is "sixty-one million, eighty-five thousand, twenty-five".