1321442043 has 8 divisors (see below), whose sum is σ = 1822678800. Its totient is φ = 850583328.

The previous prime is 1321442033. The next prime is 1321442071. The reversal of 1321442043 is 3402441231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321442043 - 2⁹ = 1321441531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321442033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7594408 + ... + 7594581.

It is an arithmetic number, because the mean of its divisors is an integer number (227834850).

Almost surely, 2^1321442043 is an apocalyptic number.

1321442043 is a deficient number, since it is larger than the sum of its proper divisors (501236757).

1321442043 is a wasteful number, since it uses less digits than its factorization.

1321442043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15189021.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1321442043 is about 36351.6442956849. The cubic root of 1321442043 is about 1097.3606260644.

Adding to 1321442043 its reverse (3402441231), we get a palindrome (4723883274).

The spelling of 1321442043 in words is "one billion, three hundred twenty-one million, four hundred forty-two thousand, forty-three".