25999087 has 4 divisors (see below), whose sum is σ = 27367480. Its totient is φ = 24630696.

The previous prime is 25999081. The next prime is 25999199. The reversal of 25999087 is 78099952.

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 25999087 - 2³ = 25999079 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 25999087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25999081) 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, 684168 + ... + 684205.

It is an arithmetic number, because the mean of its divisors is an integer number (6841870).

Almost surely, 2^25999087 is an apocalyptic number.

25999087 is a deficient number, since it is larger than the sum of its proper divisors (1368393).

25999087 is a wasteful number, since it uses less digits than its factorization.

25999087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368392.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 25999087 is about 5098.9299857911. The cubic root of 25999087 is about 296.2461391605.

The spelling of 25999087 in words is "twenty-five million, nine hundred ninety-nine thousand, eighty-seven".