61530625 has 20 divisors (see below), whose sum is σ = 82814116. Its totient is φ = 45432000.

The previous prime is 61530613. The next prime is 61530653. The reversal of 61530625 is 52603516.

It can be written as a sum of positive squares in 10 ways, for example, as 37442161 + 24088464 = 6119^2 + 4908^2 .

It is not a de Polignac number, because 61530625 - 2¹⁷ = 61399553 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 61530593 and 61530602.

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 19 ways as a sum of consecutive naturals, for example, 4339 + ... + 11911.

Almost surely, 2^61530625 is an apocalyptic number.

61530625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61530625 is a deficient number, since it is larger than the sum of its proper divisors (21283491).

61530625 is an equidigital number, since it uses as much as digits as its factorization.

61530625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7606 (or 7591 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 61530625 is about 7844.1459063432. The cubic root of 61530625 is about 394.7878474052.

The spelling of 61530625 in words is "sixty-one million, five hundred thirty thousand, six hundred twenty-five".