25940805 has 16 divisors (see below), whose sum is σ = 45278784. Its totient is φ = 12577280.

The previous prime is 25940791. The next prime is 25940839. The reversal of 25940805 is 50804952.

It is not a de Polignac number, because 25940805 - 2¹⁴ = 25924421 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 in 15 ways as a sum of consecutive naturals, for example, 78444 + ... + 78773.

It is an arithmetic number, because the mean of its divisors is an integer number (2829924).

Almost surely, 2^25940805 is an apocalyptic number.

It is an amenable number.

25940805 is a deficient number, since it is larger than the sum of its proper divisors (19337979).

25940805 is a wasteful number, since it uses less digits than its factorization.

25940805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157236.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 25940805 is about 5093.2116586688. The cubic root of 25940805 is about 296.0246091361.

The spelling of 25940805 in words is "twenty-five million, nine hundred forty thousand, eight hundred five".