25840142 has 4 divisors (see below), whose sum is σ = 38760216. Its totient is φ = 12920070.

The previous prime is 25840117. The next prime is 25840163. The reversal of 25840142 is 24104852.

It is a happy number.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 6460034 + ... + 6460037.

It is an arithmetic number, because the mean of its divisors is an integer number (9690054).

Almost surely, 2^25840142 is an apocalyptic number.

25840142 is a deficient number, since it is larger than the sum of its proper divisors (12920074).

25840142 is a wasteful number, since it uses less digits than its factorization.

25840142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12920073.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 25840142 is about 5083.3199781245. The cubic root of 25840142 is about 295.6412060628.

Adding to 25840142 its reverse (24104852), we get a palindrome (49944994).

The spelling of 25840142 in words is "twenty-five million, eight hundred forty thousand, one hundred forty-two".