25139286 has 12 divisors (see below), whose sum is σ = 54468492. Its totient is φ = 8379756.

The previous prime is 25139281. The next prime is 25139287. The reversal of 25139286 is 68293152.

It is a self number, because there is not a number n which added to its sum of digits gives 25139286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25139281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 698296 + ... + 698331.

It is an arithmetic number, because the mean of its divisors is an integer number (4539041).

Almost surely, 2^25139286 is an apocalyptic number.

25139286 is an abundant number, since it is smaller than the sum of its proper divisors (29329206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25139286 is a wasteful number, since it uses less digits than its factorization.

25139286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396635 (or 1396632 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 25139286 is about 5013.9092532674. The cubic root of 25139286 is about 292.9438014190.

It can be divided in two parts, 25139 and 286, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 25139286 in words is "twenty-five million, one hundred thirty-nine thousand, two hundred eighty-six".