1321143 has 16 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 820160.

The previous prime is 1321141. The next prime is 1321157. The reversal of 1321143 is 3411231.

It is a cyclic number.

It is not a de Polignac number, because 1321143 - 2¹ = 1321141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2596 + ... + 3062.

It is an arithmetic number, because the mean of its divisors is an integer number (117936).

2^1321143 is an apocalyptic number.

1321143 is a deficient number, since it is larger than the sum of its proper divisors (565833).

1321143 is a wasteful number, since it uses less digits than its factorization.

1321143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its digits is 72, while the sum is 15.

The square root of 1321143 is about 1149.4098485745. The cubic root of 1321143 is about 109.7277842065.

Adding to 1321143 its reverse (3411231), we get a palindrome (4732374).

It can be divided in two parts, 132 and 1143, that added together give a triangular number (1275 = T₅₀).

The spelling of 1321143 in words is "one million, three hundred twenty-one thousand, one hundred forty-three".