25840579 has 4 divisors (see below), whose sum is σ = 25941384. Its totient is φ = 25739776.

The previous prime is 25840567. The next prime is 25840609. The reversal of 25840579 is 97504852.

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 25840579 - 2²³ = 17451971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25840519) 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, 50017 + ... + 50530.

It is an arithmetic number, because the mean of its divisors is an integer number (6485346).

Almost surely, 2^25840579 is an apocalyptic number.

25840579 is a deficient number, since it is larger than the sum of its proper divisors (100805).

25840579 is a wasteful number, since it uses less digits than its factorization.

25840579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100804.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25840579 is about 5083.3629616623. The cubic root of 25840579 is about 295.6428726491.

The spelling of 25840579 in words is "twenty-five million, eight hundred forty thousand, five hundred seventy-nine".