Search a number
25180 = 2251259

25180 has 12 divisors (see below), whose sum is σ = 52920. Its totient is φ = 10064.

The previous prime is 25171. The next prime is 25183. The reversal of 25180 is 8152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25183) by changing a digit.

25180 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 610 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (4410).

225180 is an apocalyptic number.

25180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25180 is an abundant number, since it is smaller than the sum of its proper divisors (27740).

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 (26460).

25180 is a wasteful number, since it uses less digits than its factorization.

25180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 25180 is about 158.6820720813. The cubic root of 25180 is about 29.3101860549.

The spelling of 25180 in words is "twenty-five thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 1259 2518 5036 6295 12590 25180