Search a number
-
+
12981095 = 53189941
BaseRepresentation
bin110001100001…
…001101100111
3220102111201022
4301201031213
511310343340
61142121355
7215223521
oct61411547
926374638
1012981095
117366986
12442025b
1328c672a
141a1ca11
1512163b5
hexc61367

12981095 has 16 divisors (see below), whose sum is σ = 16277760. Its totient is φ = 9926400.

The previous prime is 12981083. The next prime is 12981097. The reversal of 12981095 is 59018921.

12981095 is nontrivially palindromic in base 3.

12981095 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12981095 - 216 = 12915559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13325 + ... + 14265.

It is an arithmetic number, because the mean of its divisors is an integer number (1017360).

Almost surely, 212981095 is an apocalyptic number.

12981095 is a deficient number, since it is larger than the sum of its proper divisors (3296665).

12981095 is an equidigital number, since it uses as much as digits as its factorization.

12981095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 12981095 is about 3602.9286698462. The cubic root of 12981095 is about 235.0194340349.

The spelling of 12981095 in words is "twelve million, nine hundred eighty-one thousand, ninety-five".

Divisors: 1 5 31 89 155 445 941 2759 4705 13795 29171 83749 145855 418745 2596219 12981095