25940 has 12 divisors (see below), whose sum is σ = 54516. Its totient is φ = 10368.

The previous prime is 25939. The next prime is 25943. The reversal of 25940 is 4952.

It can be written as a sum of positive squares in 2 ways, for example, as 20164 + 5776 = 142^2 + 76^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1297 = 25940 / (2 + 5 + 9 + 4 + 0).

It is a nialpdrome in base 13 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25940.

It is not an unprimeable number, because it can be changed into a prime (25943) 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, 629 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (4543).

2²⁵⁹⁴⁰ is an apocalyptic number.

25940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25940 is an abundant number, since it is smaller than the sum of its proper divisors (28576).

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 (27258).

25940 is a wasteful number, since it uses less digits than its factorization.

25940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 25940 is about 161.0589954023. The cubic root of 25940 is about 29.6021547007.

The spelling of 25940 in words is "twenty-five thousand, nine hundred forty".