1340421233 has 2 divisors, whose sum is σ = 1340421234. Its totient is φ = 1340421232.

The previous prime is 1340421217. The next prime is 1340421239. The reversal of 1340421233 is 3321240431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339047649 + 1373584 = 36593^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340421233 - 2⁴ = 1340421217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340421199 and 1340421208.

It is not a weakly prime, because it can be changed into another prime (1340421239) 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 as a sum of consecutive naturals, namely, 670210616 + 670210617.

It is an arithmetic number, because the mean of its divisors is an integer number (670210617).

Almost surely, 2^1340421233 is an apocalyptic number.

It is an amenable number.

1340421233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340421233 is an equidigital number, since it uses as much as digits as its factorization.

1340421233 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1340421233 is about 36611.7635876777. The cubic root of 1340421233 is about 1102.5892813206.

Adding to 1340421233 its reverse (3321240431), we get a palindrome (4661661664).

The spelling of 1340421233 in words is "one billion, three hundred forty million, four hundred twenty-one thousand, two hundred thirty-three".