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2825 = 52113
BaseRepresentation
bin101100001001
310212122
4230021
542300
621025
711144
oct5411
93778
102825
112139
121775
131394
14105b
15c85
hexb09

2825 has 6 divisors (see below), whose sum is σ = 3534. Its totient is φ = 2240.

The previous prime is 2819. The next prime is 2833. The reversal of 2825 is 5282.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 2809 = 4^2 + 53^2 .

It is not a de Polignac number, because 2825 - 210 = 1801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 7 and base 9.

It is a nialpdrome in base 8 and base 15.

It is a zygodrome in base 7.

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 5 ways as a sum of consecutive naturals, for example, 32 + ... + 81.

It is an arithmetic number, because the mean of its divisors is an integer number (589).

2825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2825 is a deficient number, since it is larger than the sum of its proper divisors (709).

2825 is a wasteful number, since it uses less digits than its factorization.

2825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 118 counting only the distinct ones).

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

The square root of 2825 is about 53.1507290637. The cubic root of 2825 is about 14.1364214406.

The spelling of 2825 in words is "two thousand, eight hundred twenty-five".

Divisors: 1 5 25 113 565 2825