Search a number
BaseRepresentation
bin110001011000000
31021200022
412023000
51302110
6313012
7133463
oct61300
937608
1025280
1117aa2
1212768
13b678
1492da
157755
hex62c0

25280 has 28 divisors (see below), whose sum is σ = 60960. Its totient is φ = 9984.

The previous prime is 25261. The next prime is 25301. The reversal of 25280 is 8252.

It is a happy number.

It is a Cunningham number, because it is equal to 1592-1.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281 + ... + 359.

225280 is an apocalyptic number.

25280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30480).

25280 is an abundant number, since it is smaller than the sum of its proper divisors (35680).

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

25280 is an equidigital number, since it uses as much as digits as its factorization.

25280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25280 is about 158.9968553148. The cubic root of 25280 is about 29.3489356850.

The spelling of 25280 in words is "twenty-five thousand, two hundred eighty".