25839642 has 16 divisors (see below), whose sum is σ = 51744960. Its totient is φ = 8602272.

The previous prime is 25839641. The next prime is 25839659. The reversal of 25839642 is 24693852.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25839642.

It is not an unprimeable number, because it can be changed into a prime (25839641) 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, 3459 + ... + 7977.

It is an arithmetic number, because the mean of its divisors is an integer number (3234060).

Almost surely, 2^25839642 is an apocalyptic number.

25839642 is an abundant number, since it is smaller than the sum of its proper divisors (25905318).

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

25839642 is a wasteful number, since it uses less digits than its factorization.

25839642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477.

The product of its digits is 103680, while the sum is 39.

The square root of 25839642 is about 5083.2707974295. The cubic root of 25839642 is about 295.6392991905.

The spelling of 25839642 in words is "twenty-five million, eight hundred thirty-nine thousand, six hundred forty-two".