61890425 has 12 divisors (see below), whose sum is σ = 76858176. Its totient is φ = 49438800.

The previous prime is 61890419. The next prime is 61890457. The reversal of 61890425 is 52409816.

It is a de Polignac number, because none of the positive numbers 2^k-61890425 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20780 + ... + 23570.

It is an arithmetic number, because the mean of its divisors is an integer number (6404848).

Almost surely, 2^61890425 is an apocalyptic number.

It is an amenable number.

61890425 is a deficient number, since it is larger than the sum of its proper divisors (14967751).

61890425 is a wasteful number, since it uses less digits than its factorization.

61890425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688 (or 3683 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 61890425 is about 7867.0467775398. The cubic root of 61890425 is about 395.5558589711. Note that the first 3 decimals are identical.

The spelling of 61890425 in words is "sixty-one million, eight hundred ninety thousand, four hundred twenty-five".