1231443 has 20 divisors (see below), whose sum is σ = 1922448. Its totient is φ = 784080.

The previous prime is 1231423. The next prime is 1231453. The reversal of 1231443 is 3441321.

It is not a de Polignac number, because 1231443 - 2⁵ = 1231411 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1231423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1533 + ... + 2193.

2^1231443 is an apocalyptic number.

1231443 is a deficient number, since it is larger than the sum of its proper divisors (691005).

1231443 is an equidigital number, since it uses as much as digits as its factorization.

1231443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 687 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 1231443 is about 1109.7040145913. The cubic root of 1231443 is about 107.1860100460.

Adding to 1231443 its reverse (3441321), we get a palindrome (4672764).

The spelling of 1231443 in words is "one million, two hundred thirty-one thousand, four hundred forty-three".