159961025 has 24 divisors (see below), whose sum is σ = 227318784. Its totient is φ = 109382400.

The previous prime is 159961001. The next prime is 159961037. The reversal of 159961025 is 520169951.

It is not a de Polignac number, because 159961025 - 2¹⁰ = 159960001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 159961025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74720 + ... + 76830.

It is an arithmetic number, because the mean of its divisors is an integer number (9471616).

Almost surely, 2^159961025 is an apocalyptic number.

It is an amenable number.

159961025 is a deficient number, since it is larger than the sum of its proper divisors (67357759).

159961025 is a wasteful number, since it uses less digits than its factorization.

159961025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 159961025 is about 12647.5699246930. The cubic root of 159961025 is about 542.8394387281.

The spelling of 159961025 in words is "one hundred fifty-nine million, nine hundred sixty-one thousand, twenty-five".