13271643 has 36 divisors (see below), whose sum is σ = 24095344. Its totient is φ = 6890400.

The previous prime is 13271603. The next prime is 13271651. The reversal of 13271643 is 34617231.

13271643 is a `hidden beast` number, since 13 + 2 + 7 + 1 + 643 = 666.

It is not a de Polignac number, because 13271643 - 2¹⁰ = 13270619 is a prime.

It is a super-2 number, since 2×13271643² = 352273015838898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13271603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6753 + ... + 8493.

Almost surely, 2^13271643 is an apocalyptic number.

13271643 is a deficient number, since it is larger than the sum of its proper divisors (10823701).

13271643 is a wasteful number, since it uses less digits than its factorization.

13271643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1762 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 13271643 is about 3643.0266263095. The cubic root of 13271643 is about 236.7599449366.

Adding to 13271643 its reverse (34617231), we get a palindrome (47888874).

The spelling of 13271643 in words is "thirteen million, two hundred seventy-one thousand, six hundred forty-three".