159025681 has 2 divisors, whose sum is σ = 159025682. Its totient is φ = 159025680.

The previous prime is 159025673. The next prime is 159025697. The reversal of 159025681 is 186520951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157377025 + 1648656 = 12545^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 159025681 - 2³ = 159025673 is a prime.

It is a super-2 number, since 2×159025681² = 50578334435027522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159025681.

It is not a weakly prime, because it can be changed into another prime (159025621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79512840 + 79512841.

It is an arithmetic number, because the mean of its divisors is an integer number (79512841).

Almost surely, 2^159025681 is an apocalyptic number.

It is an amenable number.

159025681 is a deficient number, since it is larger than the sum of its proper divisors (1).

159025681 is an equidigital number, since it uses as much as digits as its factorization.

159025681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 159025681 is about 12610.5384896919. The cubic root of 159025681 is about 541.7793169834.

The spelling of 159025681 in words is "one hundred fifty-nine million, twenty-five thousand, six hundred eighty-one".