61530025 has 12 divisors (see below), whose sum is σ = 78929100. Its totient is φ = 47526080.

The previous prime is 61530011. The next prime is 61530041. The reversal of 61530025 is 52003516.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 502681 + 61027344 = 709^2 + 7812^2 .

It is not a de Polignac number, because 61530025 - 2¹⁵ = 61497257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61529978 and 61530005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41710 + ... + 43159.

It is an arithmetic number, because the mean of its divisors is an integer number (6577425).

Almost surely, 2^61530025 is an apocalyptic number.

It is an amenable number.

61530025 is a deficient number, since it is larger than the sum of its proper divisors (17399075).

61530025 is a wasteful number, since it uses less digits than its factorization.

61530025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84908 (or 84903 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 61530025 is about 7844.1076611683. The cubic root of 61530025 is about 394.7865641772.

The spelling of 61530025 in words is "sixty-one million, five hundred thirty thousand, twenty-five".