25806742 has 16 divisors (see below), whose sum is σ = 41872320. Its totient is φ = 11858112.

The previous prime is 25806719. The next prime is 25806749. The reversal of 25806742 is 24760852.

It is a junction number, because it is equal to n+sod(n) for n = 25806698 and 25806707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25806749) 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 7 ways as a sum of consecutive naturals, for example, 4138 + ... + 8290.

It is an arithmetic number, because the mean of its divisors is an integer number (2617020).

Almost surely, 2^25806742 is an apocalyptic number.

25806742 is a deficient number, since it is larger than the sum of its proper divisors (16065578).

25806742 is a wasteful number, since it uses less digits than its factorization.

25806742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 25806742 is about 5080.0336613058. The cubic root of 25806742 is about 295.5137728909.

The spelling of 25806742 in words is "twenty-five million, eight hundred six thousand, seven hundred forty-two".