1342425809 has 2 divisors, whose sum is σ = 1342425810. Its totient is φ = 1342425808.

The previous prime is 1342425779. The next prime is 1342425811. The reversal of 1342425809 is 9085242431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987216400 + 355209409 = 31420^2 + 18847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1342425809 is a prime.

It is a Sophie Germain prime.

Together with 1342425811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1342425899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671212904 + 671212905.

It is an arithmetic number, because the mean of its divisors is an integer number (671212905).

Almost surely, 2^1342425809 is an apocalyptic number.

It is an amenable number.

1342425809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342425809 is an equidigital number, since it uses as much as digits as its factorization.

1342425809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1342425809 is about 36639.1294792876. The cubic root of 1342425809 is about 1103.1386417475.

The spelling of 1342425809 in words is "one billion, three hundred forty-two million, four hundred twenty-five thousand, eight hundred nine".