25867987 has 8 divisors (see below), whose sum is σ = 27286160. Its totient is φ = 24455520.

The previous prime is 25867973. The next prime is 25867991. The reversal of 25867987 is 78976852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25867987 - 2⁷ = 25867859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25864987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10537 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (3410770).

Almost surely, 2^25867987 is an apocalyptic number.

25867987 is a deficient number, since it is larger than the sum of its proper divisors (1418173).

25867987 is a wasteful number, since it uses less digits than its factorization.

25867987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853.

The product of its digits is 1693440, while the sum is 52.

The square root of 25867987 is about 5086.0581003366. The cubic root of 25867987 is about 295.7473609775.

The spelling of 25867987 in words is "twenty-five million, eight hundred sixty-seven thousand, nine hundred eighty-seven".