25641959 has 4 divisors (see below), whose sum is σ = 29305104. Its totient is φ = 21978816.

The previous prime is 25641943. The next prime is 25641961. The reversal of 25641959 is 95914652.

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 25641959 - 2⁴ = 25641943 is a prime.

It is a super-2 number, since 2×25641959² = 1315020122715362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641989) 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, 1831562 + ... + 1831575.

It is an arithmetic number, because the mean of its divisors is an integer number (7326276).

Almost surely, 2^25641959 is an apocalyptic number.

25641959 is a deficient number, since it is larger than the sum of its proper divisors (3663145).

25641959 is an equidigital number, since it uses as much as digits as its factorization.

25641959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663144.

The product of its digits is 97200, while the sum is 41.

The square root of 25641959 is about 5063.7889963939. The cubic root of 25641959 is about 294.8834510391.

The spelling of 25641959 in words is "twenty-five million, six hundred forty-one thousand, nine hundred fifty-nine".