Search a number
14981 = 71211
BaseRepresentation
bin11101010000101
3202112212
43222011
5434411
6153205
761451
oct35205
922485
1014981
111028a
128805
136a85
145661
15468b
hex3a85

14981 has 4 divisors (see below), whose sum is σ = 15264. Its totient is φ = 14700.

The previous prime is 14969. The next prime is 14983. The reversal of 14981 is 18941.

14981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-14981 is a prime.

It is a super-2 number, since 2×149812 = 448860722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14983) 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 3 ways as a sum of consecutive naturals, for example, 35 + ... + 176.

It is an arithmetic number, because the mean of its divisors is an integer number (3816).

214981 is an apocalyptic number.

14981 is the 71-st octagonal number.

It is an amenable number.

14981 is a deficient number, since it is larger than the sum of its proper divisors (283).

14981 is an equidigital number, since it uses as much as digits as its factorization.

14981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its digits is 288, while the sum is 23.

The square root of 14981 is about 122.3968953855. The cubic root of 14981 is about 24.6517034482.

The spelling of 14981 in words is "fourteen thousand, nine hundred eighty-one".

Divisors: 1 71 211 14981