25481287 has 16 divisors (see below), whose sum is σ = 28885248. Its totient is φ = 22314240.

The previous prime is 25481243. The next prime is 25481297. The reversal of 25481287 is 78218452.

It is not a de Polignac number, because 25481287 - 2²³ = 17092679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20763 + ... + 21955.

It is an arithmetic number, because the mean of its divisors is an integer number (1805328).

Almost surely, 2^25481287 is an apocalyptic number.

25481287 is a deficient number, since it is larger than the sum of its proper divisors (3403961).

25481287 is a wasteful number, since it uses less digits than its factorization.

25481287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its digits is 35840, while the sum is 37.

The square root of 25481287 is about 5047.8992660314. The cubic root of 25481287 is about 294.2662488528.

The spelling of 25481287 in words is "twenty-five million, four hundred eighty-one thousand, two hundred eighty-seven".