25650 has 48 divisors (see below), whose sum is σ = 74400. Its totient is φ = 6480.

The previous prime is 25643. The next prime is 25657. The reversal of 25650 is 5652.

It is an interprime number because it is at equal distance from previous prime (25643) and next prime (25657).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (25657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1341 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (1550).

2²⁵⁶⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37200).

25650 is an abundant number, since it is smaller than the sum of its proper divisors (48750).

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

25650 is a wasteful number, since it uses less digits than its factorization.

25650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25650 is about 160.1561737805. The cubic root of 25650 is about 29.4914271747.

The spelling of 25650 in words is "twenty-five thousand, six hundred fifty".