1321023043 has 8 divisors (see below), whose sum is σ = 1329868800. Its totient is φ = 1312193928.

The previous prime is 1321023037. The next prime is 1321023061. The reversal of 1321023043 is 3403201231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321023043 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 1321023043.

It is not an unprimeable number, because it can be changed into a prime (1321023343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182430 + ... + 189532.

It is an arithmetic number, because the mean of its divisors is an integer number (166233600).

Almost surely, 2^1321023043 is an apocalyptic number.

1321023043 is a deficient number, since it is larger than the sum of its proper divisors (8845757).

1321023043 is a wasteful number, since it uses less digits than its factorization.

1321023043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1321023043 is about 36345.8806881880. The cubic root of 1321023043 is about 1097.2446308883.

Adding to 1321023043 its reverse (3403201231), we get a palindrome (4724224274).

The spelling of 1321023043 in words is "one billion, three hundred twenty-one million, twenty-three thousand, forty-three".