25849642 has 16 divisors (see below), whose sum is σ = 47722752. Its totient is φ = 10226160.

The previous prime is 25849613. The next prime is 25849651. The reversal of 25849642 is 24694852.

It is a junction number, because it is equal to n+sod(n) for n = 25849595 and 25849604.

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 in 7 ways as a sum of consecutive naturals, for example, 70834 + ... + 71197.

It is an arithmetic number, because the mean of its divisors is an integer number (2982672).

Almost surely, 2^25849642 is an apocalyptic number.

25849642 is a deficient number, since it is larger than the sum of its proper divisors (21873110).

25849642 is a wasteful number, since it uses less digits than its factorization.

25849642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142053.

The product of its digits is 138240, while the sum is 40.

The square root of 25849642 is about 5084.2543209403. The cubic root of 25849642 is about 295.6774319646.

The spelling of 25849642 in words is "twenty-five million, eight hundred forty-nine thousand, six hundred forty-two".