Base | Representation |
---|---|
bin | 1010100111011110010101 |
3 | 12020101201201 |
4 | 22213132111 |
5 | 1203030000 |
6 | 135352501 |
7 | 32441032 |
oct | 12473625 |
9 | 5211651 |
10 | 2783125 |
11 | 1631004 |
12 | b22731 |
13 | 765a27 |
14 | 526389 |
15 | 39e96a |
hex | 2a7795 |
2783125 has 20 divisors (see below), whose sum is σ = 3583228. Its totient is φ = 2160000.
The previous prime is 2783117. The next prime is 2783153. The reversal of 2783125 is 5213872.
It can be written as a sum of positive squares in 10 ways, for example, as 2634129 + 148996 = 1623^2 + 386^2 .
It is not a de Polignac number, because 2783125 - 23 = 2783117 is a prime.
It is a Duffinian number.
2783125 is a lucky number.
It is a junction number, because it is equal to n+sod(n) for n = 2783093 and 2783102.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38089 + ... + 38161.
22783125 is an apocalyptic number.
2783125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
2783125 is a deficient number, since it is larger than the sum of its proper divisors (800103).
2783125 is an frugal number, since it uses more digits than its factorization.
2783125 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 154 (or 139 counting only the distinct ones).
The product of its digits is 3360, while the sum is 28.
The square root of 2783125 is about 1668.2700620703. The cubic root of 2783125 is about 140.6622535046.
Adding to 2783125 its reverse (5213872), we get a palindrome (7996997).
It can be divided in two parts, 278 and 3125, that added together give a triangular number (3403 = T82).
The spelling of 2783125 in words is "two million, seven hundred eighty-three thousand, one hundred twenty-five".
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