25425779 has 4 divisors (see below), whose sum is σ = 26302560. Its totient is φ = 24549000.

The previous prime is 25425773. The next prime is 25425811. The reversal of 25425779 is 97752452.

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 25425779 - 2²⁰ = 24377203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25425773) 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, 438347 + ... + 438404.

It is an arithmetic number, because the mean of its divisors is an integer number (6575640).

Almost surely, 2^25425779 is an apocalyptic number.

25425779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25425779 is a deficient number, since it is larger than the sum of its proper divisors (876781).

25425779 is an equidigital number, since it uses as much as digits as its factorization.

25425779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876780.

The product of its digits is 176400, while the sum is 41.

The square root of 25425779 is about 5042.3981397744. The cubic root of 25425779 is about 294.0524186542.

The spelling of 25425779 in words is "twenty-five million, four hundred twenty-five thousand, seven hundred seventy-nine".