25897807 has 4 divisors (see below), whose sum is σ = 27889960. Its totient is φ = 23905656.

The previous prime is 25897789. The next prime is 25897811. The reversal of 25897807 is 70879852.

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 25897807 - 2¹⁹ = 25373519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897847) 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, 996057 + ... + 996082.

It is an arithmetic number, because the mean of its divisors is an integer number (6972490).

Almost surely, 2^25897807 is an apocalyptic number.

25897807 is a deficient number, since it is larger than the sum of its proper divisors (1992153).

25897807 is a wasteful number, since it uses less digits than its factorization.

25897807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992152.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 25897807 is about 5088.9887993589. The cubic root of 25897807 is about 295.8609608442.

The spelling of 25897807 in words is "twenty-five million, eight hundred ninety-seven thousand, eight hundred seven".