13581043 has 4 divisors (see below), whose sum is σ = 15521200. Its totient is φ = 11640888.

The previous prime is 13580989. The next prime is 13581053. The reversal of 13581043 is 34018531.

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

It is not a de Polignac number, because 13581043 - 2¹⁷ = 13449971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13580999 and 13581017.

It is not an unprimeable number, because it can be changed into a prime (13581053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970068 + ... + 970081.

It is an arithmetic number, because the mean of its divisors is an integer number (3880300).

Almost surely, 2^13581043 is an apocalyptic number.

13581043 is a deficient number, since it is larger than the sum of its proper divisors (1940157).

13581043 is an equidigital number, since it uses as much as digits as its factorization.

13581043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940156.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13581043 is about 3685.2466674566. The cubic root of 13581043 is about 238.5856806342.

Adding to 13581043 its reverse (34018531), we get a palindrome (47599574).

It can be divided in two parts, 1358 and 1043, that added together give a 4-th power (2401 = 7⁴).

The spelling of 13581043 in words is "thirteen million, five hundred eighty-one thousand, forty-three".