25161539 has 8 divisors (see below), whose sum is σ = 27228432. Its totient is φ = 23113440.

The previous prime is 25161469. The next prime is 25161541. The reversal of 25161539 is 93516152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25161539 - 2¹² = 25157443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25161439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844 + ... + 7329.

It is an arithmetic number, because the mean of its divisors is an integer number (3403554).

Almost surely, 2^25161539 is an apocalyptic number.

25161539 is a deficient number, since it is larger than the sum of its proper divisors (2066893).

25161539 is a wasteful number, since it uses less digits than its factorization.

25161539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9397.

The product of its digits is 8100, while the sum is 32.

The square root of 25161539 is about 5016.1278891193. The cubic root of 25161539 is about 293.0302127286.

The spelling of 25161539 in words is "twenty-five million, one hundred sixty-one thousand, five hundred thirty-nine".