25816120 has 64 divisors (see below), whose sum is σ = 66147840. Its totient is φ = 8976000.

The previous prime is 25816111. The next prime is 25816129. The reversal of 25816120 is 2161852.

It is an interprime number because it is at equal distance from previous prime (25816111) and next prime (25816129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816129) 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, 8845 + ... + 11395.

It is an arithmetic number, because the mean of its divisors is an integer number (1033560).

Almost surely, 2^25816120 is an apocalyptic number.

25816120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25816120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33073920).

25816120 is an abundant number, since it is smaller than the sum of its proper divisors (40331720).

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

25816120 is a wasteful number, since it uses less digits than its factorization.

25816120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 25816120 is about 5080.9566028456. The cubic root of 25816120 is about 295.5495644751.

Adding to 25816120 its reverse (2161852), we get a palindrome (27977972).

The spelling of 25816120 in words is "twenty-five million, eight hundred sixteen thousand, one hundred twenty".