25642959 has 4 divisors (see below), whose sum is σ = 34190616. Its totient is φ = 17095304.

The previous prime is 25642957. The next prime is 25642973. The reversal of 25642959 is 95924652.

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 25642959 - 2¹ = 25642957 is a prime.

It is a super-2 number, since 2×25642959² = 1315122692551362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25642959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642957) 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, 4273824 + ... + 4273829.

It is an arithmetic number, because the mean of its divisors is an integer number (8547654).

Almost surely, 2^25642959 is an apocalyptic number.

25642959 is a deficient number, since it is larger than the sum of its proper divisors (8547657).

25642959 is an equidigital number, since it uses as much as digits as its factorization.

25642959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547656.

The product of its digits is 194400, while the sum is 42.

The square root of 25642959 is about 5063.8877357224. The cubic root of 25642959 is about 294.8872843346.

The spelling of 25642959 in words is "twenty-five million, six hundred forty-two thousand, nine hundred fifty-nine".