1242212339 has 2 divisors, whose sum is σ = 1242212340. Its totient is φ = 1242212338.

The previous prime is 1242212329. The next prime is 1242212351. The reversal of 1242212339 is 9332122421.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9332122421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242212339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242212329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621106169 + 621106170.

It is an arithmetic number, because the mean of its divisors is an integer number (621106170).

Almost surely, 2^1242212339 is an apocalyptic number.

1242212339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242212339 is an equidigital number, since it uses as much as digits as its factorization.

1242212339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1242212339 is about 35245.0328273361. The cubic root of 1242212339 is about 1074.9756155276.

The spelling of 1242212339 in words is "one billion, two hundred forty-two million, two hundred twelve thousand, three hundred thirty-nine".