1321144043 has 16 divisors (see below), whose sum is σ = 1405501440. Its totient is φ = 1238328000.

The previous prime is 1321143979. The next prime is 1321144049. The reversal of 1321144043 is 3404411231.

It is a cyclic number.

It is not a de Polignac number, because 1321144043 - 2⁶ = 1321143979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321144049) 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, 1449758 + ... + 1450668.

It is an arithmetic number, because the mean of its divisors is an integer number (87843840).

Almost surely, 2^1321144043 is an apocalyptic number.

1321144043 is a deficient number, since it is larger than the sum of its proper divisors (84357397).

1321144043 is a wasteful number, since it uses less digits than its factorization.

1321144043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1321144043 is about 36347.5452128476. The cubic root of 1321144043 is about 1097.2781308204.

Adding to 1321144043 its reverse (3404411231), we get a palindrome (4725555274).

The spelling of 1321144043 in words is "one billion, three hundred twenty-one million, one hundred forty-four thousand, forty-three".