25681942 has 16 divisors (see below), whose sum is σ = 45258192. Its totient is φ = 10775520.

The previous prime is 25681927. The next prime is 25681969. The reversal of 25681942 is 24918652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44613 + ... + 45184.

It is an arithmetic number, because the mean of its divisors is an integer number (2828637).

Almost surely, 2^25681942 is an apocalyptic number.

25681942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25681942 is a deficient number, since it is larger than the sum of its proper divisors (19576250).

25681942 is a wasteful number, since it uses less digits than its factorization.

25681942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89823.

The product of its digits is 34560, while the sum is 37.

The square root of 25681942 is about 5067.7353916715. The cubic root of 25681942 is about 295.0366400913.

The spelling of 25681942 in words is "twenty-five million, six hundred eighty-one thousand, nine hundred forty-two".