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25389 = 3271331
BaseRepresentation
bin110001100101101
31021211100
412030231
51303024
6313313
7134010
oct61455
937740
1025389
1118091
1212839
13b730
149377
1577c9
hex632d

25389 has 24 divisors (see below), whose sum is σ = 46592. Its totient is φ = 12960.

The previous prime is 25373. The next prime is 25391. The reversal of 25389 is 98352.

25389 is nontrivially palindromic in base 6.

25389 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 25389 - 24 = 25373 is a prime.

It is a d-powerful number, because it can be written as 28 + 54 + 39 + 84 + 93 .

Its product of digits (2160) is a multiple of the sum of its prime divisors (54).

25389 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25309) 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, 804 + ... + 834.

225389 is an apocalyptic number.

It is an amenable number.

25389 is a deficient number, since it is larger than the sum of its proper divisors (21203).

25389 is a wasteful number, since it uses less digits than its factorization.

25389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 54 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 25389 is about 159.3392606987. The cubic root of 25389 is about 29.3910565605.

It can be divided in two parts, 25 and 389, that added together give a palindrome (414).

The spelling of 25389 in words is "twenty-five thousand, three hundred eighty-nine".

Divisors: 1 3 7 9 13 21 31 39 63 91 93 117 217 273 279 403 651 819 1209 1953 2821 3627 8463 25389