25284287 has 16 divisors (see below), whose sum is σ = 30792960. Its totient is φ = 20266368.

The previous prime is 25284271. The next prime is 25284289. The reversal of 25284287 is 78248252.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25284287 - 2⁴ = 25284271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25284287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25284289) 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, 20708 + ... + 21894.

It is an arithmetic number, because the mean of its divisors is an integer number (1924560).

Almost surely, 2^25284287 is an apocalyptic number.

25284287 is a deficient number, since it is larger than the sum of its proper divisors (5508673).

25284287 is a wasteful number, since it uses less digits than its factorization.

25284287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its digits is 71680, while the sum is 38.

The square root of 25284287 is about 5028.3483371779. The cubic root of 25284287 is about 293.5059459552.

The spelling of 25284287 in words is "twenty-five million, two hundred eighty-four thousand, two hundred eighty-seven".