25399159 has 4 divisors (see below), whose sum is σ = 25661104. Its totient is φ = 25137216.

The previous prime is 25399147. The next prime is 25399163. The reversal of 25399159 is 95199352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25399159 - 2¹⁵ = 25366391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25399169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130827 + ... + 131020.

It is an arithmetic number, because the mean of its divisors is an integer number (6415276).

Almost surely, 2^25399159 is an apocalyptic number.

25399159 is a deficient number, since it is larger than the sum of its proper divisors (261945).

25399159 is an equidigital number, since it uses as much as digits as its factorization.

25399159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261944.

The product of its digits is 109350, while the sum is 43.

The square root of 25399159 is about 5039.7578314836. The cubic root of 25399159 is about 293.9497615733.

The spelling of 25399159 in words is "twenty-five million, three hundred ninety-nine thousand, one hundred fifty-nine".