25860287 has 4 divisors (see below), whose sum is σ = 25877880. Its totient is φ = 25842696.

The previous prime is 25860277. The next prime is 25860319. The reversal of 25860287 is 78206852.

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 25860287 - 2⁴ = 25860271 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 25860287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25860277) 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, 6368 + ... + 9605.

It is an arithmetic number, because the mean of its divisors is an integer number (6469470).

Almost surely, 2^25860287 is an apocalyptic number.

25860287 is a deficient number, since it is larger than the sum of its proper divisors (17593).

25860287 is a wasteful number, since it uses less digits than its factorization.

25860287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17592.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 25860287 is about 5085.3010726996. The cubic root of 25860287 is about 295.7180134978.

The spelling of 25860287 in words is "twenty-five million, eight hundred sixty thousand, two hundred eighty-seven".