25493 has 8 divisors (see below), whose sum is σ = 28728. Its totient is φ = 22464.

The previous prime is 25471. The next prime is 25523. The reversal of 25493 is 39452.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 18769 = 82^2 + 137^2 .

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

It is not a de Polignac number, because 25493 - 2⁸ = 25237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25423) 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, 455 + ... + 507.

It is an arithmetic number, because the mean of its divisors is an integer number (3591).

2²⁵⁴⁹³ is an apocalyptic number.

It is an amenable number.

25493 is a deficient number, since it is larger than the sum of its proper divisors (3235).

25493 is a wasteful number, since it uses less digits than its factorization.

25493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103.

The product of its digits is 1080, while the sum is 23.

The square root of 25493 is about 159.6652748722. The cubic root of 25493 is about 29.4311330466.

It can be divided in two parts, 2549 and 3, that added together give a palindrome (2552).

The spelling of 25493 in words is "twenty-five thousand, four hundred ninety-three".