1330421243 has 2 divisors, whose sum is σ = 1330421244. Its totient is φ = 1330421242.

The previous prime is 1330421231. The next prime is 1330421263. The reversal of 1330421243 is 3421240331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1330421243 - 2⁴ = 1330421227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1330421263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665210621 + 665210622.

It is an arithmetic number, because the mean of its divisors is an integer number (665210622).

Almost surely, 2^1330421243 is an apocalyptic number.

1330421243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330421243 is an equidigital number, since it uses as much as digits as its factorization.

1330421243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1330421243 is about 36474.9399314104. The cubic root of 1330421243 is about 1099.8405396950.

Adding to 1330421243 its reverse (3421240331), we get a palindrome (4751661574).

The spelling of 1330421243 in words is "one billion, three hundred thirty million, four hundred twenty-one thousand, two hundred forty-three".