25444142 has 4 divisors (see below), whose sum is σ = 38166216. Its totient is φ = 12722070.

The previous prime is 25444129. The next prime is 25444151. The reversal of 25444142 is 24144452.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6361034 + ... + 6361037.

It is an arithmetic number, because the mean of its divisors is an integer number (9541554).

Almost surely, 2^25444142 is an apocalyptic number.

25444142 is a deficient number, since it is larger than the sum of its proper divisors (12722074).

25444142 is a wasteful number, since it uses less digits than its factorization.

25444142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12722073.

The product of its digits is 5120, while the sum is 26.

The square root of 25444142 is about 5044.2186709143. The cubic root of 25444142 is about 294.1231917747.

Adding to 25444142 its reverse (24144452), we get a palindrome (49588594).

The spelling of 25444142 in words is "twenty-five million, four hundred forty-four thousand, one hundred forty-two".