25109442 has 48 divisors (see below), whose sum is σ = 59484672. Its totient is φ = 7620480.

The previous prime is 25109419. The next prime is 25109449. The reversal of 25109442 is 24490152.

It is not an unprimeable number, because it can be changed into a prime (25109449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8163 + ... + 10809.

It is an arithmetic number, because the mean of its divisors is an integer number (1239264).

Almost surely, 2^25109442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25109442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29742336).

25109442 is an abundant number, since it is smaller than the sum of its proper divisors (34375230).

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

25109442 is a wasteful number, since it uses less digits than its factorization.

25109442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25109442 is about 5010.9322485941. The cubic root of 25109442 is about 292.8278331734.

Adding to 25109442 its reverse (24490152), we get a palindrome (49599594).

The spelling of 25109442 in words is "twenty-five million, one hundred nine thousand, four hundred forty-two".