25508142 has 32 divisors (see below), whose sum is σ = 61839360. Its totient is φ = 7729560.

The previous prime is 25508123. The next prime is 25508179. The reversal of 25508142 is 24180552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20878 + ... + 22065.

It is an arithmetic number, because the mean of its divisors is an integer number (1932480).

Almost surely, 2^25508142 is an apocalyptic number.

25508142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25508142 is an abundant number, since it is smaller than the sum of its proper divisors (36331218).

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

25508142 is a wasteful number, since it uses less digits than its factorization.

25508142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42965 (or 42959 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25508142 is about 5050.5585829688. The cubic root of 25508142 is about 294.3695893362.

Adding to 25508142 its reverse (24180552), we get a palindrome (49688694).

The spelling of 25508142 in words is "twenty-five million, five hundred eight thousand, one hundred forty-two".