25140142 has 16 divisors (see below), whose sum is σ = 38541312. Its totient is φ = 12295800.

The previous prime is 25140139. The next prime is 25140149. The reversal of 25140142 is 24104152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21267 + ... + 22417.

It is an arithmetic number, because the mean of its divisors is an integer number (2408832).

Almost surely, 2^25140142 is an apocalyptic number.

25140142 is a deficient number, since it is larger than the sum of its proper divisors (13401170).

25140142 is a wasteful number, since it uses less digits than its factorization.

25140142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 25140142 is about 5013.9946150749. The cubic root of 25140142 is about 292.9471263218.

Adding to 25140142 its reverse (24104152), we get a palindrome (49244294).

The spelling of 25140142 in words is "twenty-five million, one hundred forty thousand, one hundred forty-two".