1342209257 has 2 divisors, whose sum is σ = 1342209258. Its totient is φ = 1342209256.

The previous prime is 1342209247. The next prime is 1342209307. The reversal of 1342209257 is 7529022431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765296896 + 576912361 = 27664^2 + 24019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1342209257 - 2⁴ = 1342209241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1342209217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671104628 + 671104629.

It is an arithmetic number, because the mean of its divisors is an integer number (671104629).

Almost surely, 2^1342209257 is an apocalyptic number.

It is an amenable number.

1342209257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342209257 is an equidigital number, since it uses as much as digits as its factorization.

1342209257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1342209257 is about 36636.1741588829. The cubic root of 1342209257 is about 1103.0793213431.

The spelling of 1342209257 in words is "one billion, three hundred forty-two million, two hundred nine thousand, two hundred fifty-seven".