13145643 has 48 divisors (see below), whose sum is σ = 23003136. Its totient is φ = 7076160.

The previous prime is 13145617. The next prime is 13145651. The reversal of 13145643 is 34654131.

13145643 is a `hidden beast` number, since 1 + 3 + 14 + 5 + 643 = 666.

It is not a de Polignac number, because 13145643 - 2⁵ = 13145611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13145603) 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 47 ways as a sum of consecutive naturals, for example, 103446 + ... + 103572.

It is an arithmetic number, because the mean of its divisors is an integer number (479232).

Almost surely, 2^13145643 is an apocalyptic number.

13145643 is a deficient number, since it is larger than the sum of its proper divisors (9857493).

13145643 is a wasteful number, since it uses less digits than its factorization.

13145643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 221 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 13145643 is about 3625.6920718671. The cubic root of 13145643 is about 236.0083007231.

Adding to 13145643 its reverse (34654131), we get a palindrome (47799774).

The spelling of 13145643 in words is "thirteen million, one hundred forty-five thousand, six hundred forty-three".