25897567 has 4 divisors (see below), whose sum is σ = 26499880. Its totient is φ = 25295256.

The previous prime is 25897559. The next prime is 25897607. The reversal of 25897567 is 76579852.

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 25897567 - 2³ = 25897559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25897567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897537) 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, 301092 + ... + 301177.

It is an arithmetic number, because the mean of its divisors is an integer number (6624970).

Almost surely, 2^25897567 is an apocalyptic number.

25897567 is a deficient number, since it is larger than the sum of its proper divisors (602313).

25897567 is an equidigital number, since it uses as much as digits as its factorization.

25897567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602312.

The product of its digits is 1058400, while the sum is 49.

The square root of 25897567 is about 5088.9652189812. The cubic root of 25897567 is about 295.8600469077.

The spelling of 25897567 in words is "twenty-five million, eight hundred ninety-seven thousand, five hundred sixty-seven".