13261143 has 8 divisors (see below), whose sum is σ = 20207488. Its totient is φ = 7577784.

The previous prime is 13261123. The next prime is 13261153. The reversal of 13261143 is 34116231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13261143 - 2¹⁷ = 13130071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 631483 = 13261143 / (1 + 3 + 2 + 6 + 1 + 1 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13261103) 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 7 ways as a sum of consecutive naturals, for example, 315721 + ... + 315762.

It is an arithmetic number, because the mean of its divisors is an integer number (2525936).

Almost surely, 2^13261143 is an apocalyptic number.

13261143 is a deficient number, since it is larger than the sum of its proper divisors (6946345).

13261143 is an equidigital number, since it uses as much as digits as its factorization.

13261143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631493.

The product of its digits is 432, while the sum is 21.

The square root of 13261143 is about 3641.5852317363. The cubic root of 13261143 is about 236.6974900893.

Adding to 13261143 its reverse (34116231), we get a palindrome (47377374).

The spelling of 13261143 in words is "thirteen million, two hundred sixty-one thousand, one hundred forty-three".