25860987 has 12 divisors (see below), whose sum is σ = 37512904. Its totient is φ = 17167680.

The previous prime is 25860983. The next prime is 25861001. The reversal of 25860987 is 78906852.

It is not a de Polignac number, because 25860987 - 2² = 25860983 is a prime.

It is a super-2 number, since 2×25860987² = 1337581297228338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25860983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3793 + ... + 8130.

Almost surely, 2^25860987 is an apocalyptic number.

25860987 is a deficient number, since it is larger than the sum of its proper divisors (11651917).

25860987 is a wasteful number, since it uses less digits than its factorization.

25860987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170 (or 12167 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 25860987 is about 5085.3698980507. The cubic root of 25860987 is about 295.7206816912.

The spelling of 25860987 in words is "twenty-five million, eight hundred sixty thousand, nine hundred eighty-seven".