25404142 has 16 divisors (see below), whose sum is σ = 39473280. Its totient is φ = 12253752.

The previous prime is 25404139. The next prime is 25404149. The reversal of 25404142 is 24140452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25404149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5359 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (2467080).

Almost surely, 2^25404142 is an apocalyptic number.

25404142 is a deficient number, since it is larger than the sum of its proper divisors (14069138).

25404142 is a wasteful number, since it uses less digits than its factorization.

25404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 25404142 is about 5040.2521762309. The cubic root of 25404142 is about 293.9689834156.

Adding to 25404142 its reverse (24140452), we get a palindrome (49544594).

The spelling of 25404142 in words is "twenty-five million, four hundred four thousand, one hundred forty-two".