25708122 has 48 divisors (see below), whose sum is σ = 61225632. Its totient is φ = 7731360.

The previous prime is 25708117. The next prime is 25708139. The reversal of 25708122 is 22180752.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30673 + ... + 31499.

It is an arithmetic number, because the mean of its divisors is an integer number (1275534).

Almost surely, 2^25708122 is an apocalyptic number.

25708122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25708122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30612816).

25708122 is an abundant number, since it is smaller than the sum of its proper divisors (35517510).

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

25708122 is a wasteful number, since it uses less digits than its factorization.

25708122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25708122 is about 5070.3177415227. The cubic root of 25708122 is about 295.1368588378.

Adding to 25708122 its reverse (22180752), we get a palindrome (47888874).

The spelling of 25708122 in words is "twenty-five million, seven hundred eight thousand, one hundred twenty-two".