25868643 has 16 divisors (see below), whose sum is σ = 35059200. Its totient is φ = 16964640.

The previous prime is 25868621. The next prime is 25868653. The reversal of 25868643 is 34686852.

It is not a de Polignac number, because 25868643 - 2⁸ = 25868387 is a prime.

It is a super-2 number, since 2×25868643² = 1338373381322898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25868595 and 25868604.

It is not an unprimeable number, because it can be changed into a prime (25868653) 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 15 ways as a sum of consecutive naturals, for example, 77988 + ... + 78318.

It is an arithmetic number, because the mean of its divisors is an integer number (2191200).

Almost surely, 2^25868643 is an apocalyptic number.

25868643 is a deficient number, since it is larger than the sum of its proper divisors (9190557).

25868643 is a wasteful number, since it uses less digits than its factorization.

25868643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its digits is 276480, while the sum is 42.

The square root of 25868643 is about 5086.1225899500. The cubic root of 25868643 is about 295.7498609611.

The spelling of 25868643 in words is "twenty-five million, eight hundred sixty-eight thousand, six hundred forty-three".