25413887 has 16 divisors (see below), whose sum is σ = 27648000. Its totient is φ = 23283360.

The previous prime is 25413877. The next prime is 25413901. The reversal of 25413887 is 78831452.

It is not a de Polignac number, because 25413887 - 2⁶ = 25413823 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 25413887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25413877) 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, 132962 + ... + 133152.

It is an arithmetic number, because the mean of its divisors is an integer number (1728000).

Almost surely, 2^25413887 is an apocalyptic number.

25413887 is a deficient number, since it is larger than the sum of its proper divisors (2234113).

25413887 is a wasteful number, since it uses less digits than its factorization.

25413887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406.

The product of its digits is 53760, while the sum is 38.

The square root of 25413887 is about 5041.2188010440. The cubic root of 25413887 is about 294.0065673329.

It can be divided in two parts, 254 and 13887, that added together give a palindrome (14141).

The spelling of 25413887 in words is "twenty-five million, four hundred thirteen thousand, eight hundred eighty-seven".