1321006433 has 2 divisors, whose sum is σ = 1321006434. Its totient is φ = 1321006432.

The previous prime is 1321006417. The next prime is 1321006451. The reversal of 1321006433 is 3346001231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210483264 + 110523169 = 34792^2 + 10513^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321006433 - 2⁴ = 1321006417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321006399 and 1321006408.

It is not a weakly prime, because it can be changed into another prime (1321000433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660503216 + 660503217.

It is an arithmetic number, because the mean of its divisors is an integer number (660503217).

Almost surely, 2^1321006433 is an apocalyptic number.

It is an amenable number.

1321006433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321006433 is an equidigital number, since it uses as much as digits as its factorization.

1321006433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1321006433 is about 36345.6521883980. The cubic root of 1321006433 is about 1097.2400321015.

Adding to 1321006433 its reverse (3346001231), we get a palindrome (4667007664).

The spelling of 1321006433 in words is "one billion, three hundred twenty-one million, six thousand, four hundred thirty-three".