25686142 has 16 divisors (see below), whose sum is σ = 39076560. Its totient is φ = 12662208.

The previous prime is 25686137. The next prime is 25686149. The reversal of 25686142 is 24168652.

It is a junction number, because it is equal to n+sod(n) for n = 25686098 and 25686107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25686149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55978 + ... + 56434.

It is an arithmetic number, because the mean of its divisors is an integer number (2442285).

Almost surely, 2^25686142 is an apocalyptic number.

25686142 is a deficient number, since it is larger than the sum of its proper divisors (13390418).

25686142 is a wasteful number, since it uses less digits than its factorization.

25686142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 23040, while the sum is 34.

The square root of 25686142 is about 5068.1497610075. The cubic root of 25686142 is about 295.0527225504.

The spelling of 25686142 in words is "twenty-five million, six hundred eighty-six thousand, one hundred forty-two".