25725918 has 16 divisors (see below), whose sum is σ = 51521040. Its totient is φ = 8563776.

The previous prime is 25725907. The next prime is 25725961. The reversal of 25725918 is 81952752.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818 + ... + 7706.

It is an arithmetic number, because the mean of its divisors is an integer number (3220065).

Almost surely, 2^25725918 is an apocalyptic number.

25725918 is an abundant number, since it is smaller than the sum of its proper divisors (25795122).

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

25725918 is a wasteful number, since it uses less digits than its factorization.

25725918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771.

The product of its digits is 50400, while the sum is 39.

The square root of 25725918 is about 5072.0723575280. The cubic root of 25725918 is about 295.2049442478.

The spelling of 25725918 in words is "twenty-five million, seven hundred twenty-five thousand, nine hundred eighteen".