25742 has 8 divisors (see below), whose sum is σ = 39432. Its totient is φ = 12600.

The previous prime is 25741. The next prime is 25747. The reversal of 25742 is 24752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 227.

It is an arithmetic number, because the mean of its divisors is an integer number (4929).

2²⁵⁷⁴² is an apocalyptic number.

25742 is a deficient number, since it is larger than the sum of its proper divisors (13690).

25742 is a wasteful number, since it uses less digits than its factorization.

25742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274.

The product of its digits is 560, while the sum is 20.

The square root of 25742 is about 160.4431363443. The cubic root of 25742 is about 29.5266445092.

Subtracting from 25742 its reverse (24752), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 25 and 742, that added together give a palindrome (767).

The spelling of 25742 in words is "twenty-five thousand, seven hundred forty-two".