25715287 has 8 divisors (see below), whose sum is σ = 27765360. Its totient is φ = 23675520.

The previous prime is 25715279. The next prime is 25715293. The reversal of 25715287 is 78251752.

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 25715287 - 2³ = 25715279 is a prime.

It is a super-2 number, since 2×25715287² = 1322551970984738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25715267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3087 + ... + 7807.

It is an arithmetic number, because the mean of its divisors is an integer number (3470670).

Almost surely, 2^25715287 is an apocalyptic number.

25715287 is a deficient number, since it is larger than the sum of its proper divisors (2050073).

25715287 is a wasteful number, since it uses less digits than its factorization.

25715287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153.

The product of its digits is 39200, while the sum is 37.

The square root of 25715287 is about 5071.0242555129. The cubic root of 25715287 is about 295.1642750654.

The spelling of 25715287 in words is "twenty-five million, seven hundred fifteen thousand, two hundred eighty-seven".