1231342443 has 24 divisors (see below), whose sum is σ = 1890420480. Its totient is φ = 770128560.

The previous prime is 1231342423. The next prime is 1231342447. The reversal of 1231342443 is 3442431321.

1231342443 is a `hidden beast` number, since 1 + 231 + 3 + 424 + 4 + 3 = 666.

It is not a de Polignac number, because 1231342443 - 2⁶ = 1231342379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231342447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17343 + ... + 52568.

It is an arithmetic number, because the mean of its divisors is an integer number (78767520).

Almost surely, 2^1231342443 is an apocalyptic number.

1231342443 is a deficient number, since it is larger than the sum of its proper divisors (659078037).

1231342443 is a wasteful number, since it uses less digits than its factorization.

1231342443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70039 (or 70036 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 1231342443 is about 35090.4893525297. The cubic root of 1231342443 is about 1071.8309243981.

Adding to 1231342443 its reverse (3442431321), we get a palindrome (4673773764).

It can be divided in two parts, 12313 and 42443, that added together give a square (54756 = 234²).

The spelling of 1231342443 in words is "one billion, two hundred thirty-one million, three hundred forty-two thousand, four hundred forty-three".