25857942 has 24 divisors (see below), whose sum is σ = 56846328. Its totient is φ = 7835520.

The previous prime is 25857929. The next prime is 25857967. The reversal of 25857942 is 24975852.

It is a junction number, because it is equal to n+sod(n) for n = 25857894 and 25857903.

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 11 ways as a sum of consecutive naturals, for example, 17083 + ... + 18534.

It is an arithmetic number, because the mean of its divisors is an integer number (2368597).

Almost surely, 2^25857942 is an apocalyptic number.

25857942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25857942 is an abundant number, since it is smaller than the sum of its proper divisors (30988386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25857942 is a wasteful number, since it uses less digits than its factorization.

25857942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35644 (or 35633 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 25857942 is about 5085.0705009862. The cubic root of 25857942 is about 295.7090746991.

The spelling of 25857942 in words is "twenty-five million, eight hundred fifty-seven thousand, nine hundred forty-two".