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115521 = 375501
BaseRepresentation
bin11100001101000001
312212110120
4130031001
512144041
62250453
7660540
oct341501
9185416
10115521
117987a
1256a29
1340773
1430157
1524366
hex1c341

115521 has 8 divisors (see below), whose sum is σ = 176064. Its totient is φ = 66000.

The previous prime is 115513. The next prime is 115523. The reversal of 115521 is 125511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115521 - 23 = 115513 is a prime.

115521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 115521.

It is not an unprimeable number, because it can be changed into a prime (115523) 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 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (22008).

2115521 is an apocalyptic number.

It is an amenable number.

115521 is a deficient number, since it is larger than the sum of its proper divisors (60543).

115521 is an equidigital number, since it uses as much as digits as its factorization.

115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its digits is 50, while the sum is 15.

The square root of 115521 is about 339.8838036741. The cubic root of 115521 is about 48.7027681921.

It can be divided in two parts, 1155 and 21, that added together give a triangular number (1176 = T48).

The spelling of 115521 in words is "one hundred fifteen thousand, five hundred twenty-one".

Divisors: 1 3 7 21 5501 16503 38507 115521