61430525 has 12 divisors (see below), whose sum is σ = 82033812. Its totient is φ = 45363840.

The previous prime is 61430521. The next prime is 61430533. The reversal of 61430525 is 52503416.

It can be written as a sum of positive squares in 6 ways, for example, as 2785561 + 58644964 = 1669^2 + 7658^2 .

It is not a de Polignac number, because 61430525 - 2² = 61430521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61430494 and 61430503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61430521) by changing a digit.

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, 94184 + ... + 94833.

It is an arithmetic number, because the mean of its divisors is an integer number (6836151).

Almost surely, 2^61430525 is an apocalyptic number.

61430525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61430525 is a deficient number, since it is larger than the sum of its proper divisors (20603287).

61430525 is a wasteful number, since it uses less digits than its factorization.

61430525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189040 (or 189035 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 61430525 is about 7837.7627547662. The cubic root of 61430525 is about 394.5736466839.

The spelling of 61430525 in words is "sixty-one million, four hundred thirty thousand, five hundred twenty-five".