1321456143 has 16 divisors (see below), whose sum is σ = 2015108096. Its totient is φ = 754570080.

The previous prime is 1321456141. The next prime is 1321456163. The reversal of 1321456143 is 3416541231.

It is not a de Polignac number, because 1321456143 - 2¹ = 1321456141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321456143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321456141) 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, 7773 + ... + 51993.

It is an arithmetic number, because the mean of its divisors is an integer number (125944256).

Almost surely, 2^1321456143 is an apocalyptic number.

1321456143 is a deficient number, since it is larger than the sum of its proper divisors (693651953).

1321456143 is a wasteful number, since it uses less digits than its factorization.

1321456143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45654.

The product of its digits is 8640, while the sum is 30.

The square root of 1321456143 is about 36351.8382341251. The cubic root of 1321456143 is about 1097.3645290556.

Adding to 1321456143 its reverse (3416541231), we get a palindrome (4737997374).

The spelling of 1321456143 in words is "one billion, three hundred twenty-one million, four hundred fifty-six thousand, one hundred forty-three".