25426987 has 8 divisors (see below), whose sum is σ = 25698816. Its totient is φ = 25156992.

The previous prime is 25426981. The next prime is 25426991. The reversal of 25426987 is 78962452.

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 25426987 - 2³ = 25426979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25426981) 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, 66198 + ... + 66580.

It is an arithmetic number, because the mean of its divisors is an integer number (3212352).

Almost surely, 2^25426987 is an apocalyptic number.

25426987 is a deficient number, since it is larger than the sum of its proper divisors (271829).

25426987 is a wasteful number, since it uses less digits than its factorization.

25426987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its digits is 241920, while the sum is 43.

The square root of 25426987 is about 5042.5179226256. The cubic root of 25426987 is about 294.0570754724.

The spelling of 25426987 in words is "twenty-five million, four hundred twenty-six thousand, nine hundred eighty-seven".