1213432143 has 32 divisors (see below), whose sum is σ = 2020349952. Its totient is φ = 629349600.

The previous prime is 1213432133. The next prime is 1213432201. The reversal of 1213432143 is 3412343121.

It is a happy number.

It is not a de Polignac number, because 1213432143 - 2⁴ = 1213432127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213432133) 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 31 ways as a sum of consecutive naturals, for example, 153928 + ... + 161618.

It is an arithmetic number, because the mean of its divisors is an integer number (63135936).

Almost surely, 2^1213432143 is an apocalyptic number.

1213432143 is a deficient number, since it is larger than the sum of its proper divisors (806917809).

1213432143 is a wasteful number, since it uses less digits than its factorization.

1213432143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395.

The product of its digits is 1728, while the sum is 24.

The square root of 1213432143 is about 34834.3529149028. The cubic root of 1213432143 is about 1066.6088061171.

Adding to 1213432143 its reverse (3412343121), we get a palindrome (4625775264).

The spelling of 1213432143 in words is "one billion, two hundred thirteen million, four hundred thirty-two thousand, one hundred forty-three".