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BaseRepresentation
bin11100001001010001
312212010200
4130021101
512142111
62245413
7660045
oct341121
9185120
10115281
1179681
1256869
134061a
1430025
1524256
hex1c251

115281 has 6 divisors (see below), whose sum is σ = 166530. Its totient is φ = 76848.

The previous prime is 115279. The next prime is 115301. The reversal of 115281 is 182511.

It can be written as a sum of positive squares in only one way, i.e., 90000 + 25281 = 300^2 + 159^2 .

It is not a de Polignac number, because 115281 - 21 = 115279 is a prime.

It is a super-2 number, since 2×1152812 = 26579417922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115201) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6396 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (27755).

2115281 is an apocalyptic number.

It is an amenable number.

115281 is a deficient number, since it is larger than the sum of its proper divisors (51249).

115281 is a wasteful number, since it uses less digits than its factorization.

115281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815 (or 12812 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 115281 is about 339.5305582713. The cubic root of 115281 is about 48.6690174215.

Adding to 115281 its reverse (182511), we get a palindrome (297792).

The spelling of 115281 in words is "one hundred fifteen thousand, two hundred eighty-one".

Divisors: 1 3 9 12809 38427 115281