25494 has 16 divisors (see below), whose sum is σ = 58368. Its totient is φ = 7272.

The previous prime is 25471. The next prime is 25523. The reversal of 25494 is 49452.

25494 = 7² + 8² + ... + 42².

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 5³ + 4³ + 9³ + 4⁷ .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262 + ... + 345.

It is an arithmetic number, because the mean of its divisors is an integer number (3648).

2²⁵⁴⁹⁴ is an apocalyptic number.

25494 is an abundant number, since it is smaller than the sum of its proper divisors (32874).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29184).

25494 is a wasteful number, since it uses less digits than its factorization.

25494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 1440, while the sum is 24.

The square root of 25494 is about 159.6684063927. The cubic root of 25494 is about 29.4315178679.

The spelling of 25494 in words is "twenty-five thousand, four hundred ninety-four".