Search a number
-
+
13081741 = 17375617
BaseRepresentation
bin110001111001…
…110010001101
3220121121202221
4301321302031
511322103431
61144215341
7216123121
oct61716215
926547687
1013081741
117425562
12446a551
13293049a
141a47581
151236111
hexc79c8d

13081741 has 4 divisors (see below), whose sum is σ = 13157532. Its totient is φ = 13005952.

The previous prime is 13081729. The next prime is 13081751. The reversal of 13081741 is 14718031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8037225 + 5044516 = 2835^2 + 2246^2 .

It is a cyclic number.

It is not a de Polignac number, because 13081741 - 27 = 13081613 is a prime.

It is a super-2 number, since 2×130817412 = 342263895182162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37636 + ... + 37981.

It is an arithmetic number, because the mean of its divisors is an integer number (3289383).

Almost surely, 213081741 is an apocalyptic number.

It is an amenable number.

13081741 is a deficient number, since it is larger than the sum of its proper divisors (75791).

13081741 is an equidigital number, since it uses as much as digits as its factorization.

13081741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75790.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 13081741 is about 3616.8689497962. The cubic root of 13081741 is about 235.6252611123.

Adding to 13081741 its reverse (14718031), we get a palindrome (27799772).

The spelling of 13081741 in words is "thirteen million, eighty-one thousand, seven hundred forty-one".

Divisors: 1 173 75617 13081741