1242105299 has 2 divisors, whose sum is σ = 1242105300. Its totient is φ = 1242105298.

The previous prime is 1242105287. The next prime is 1242105301. The reversal of 1242105299 is 9925012421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242105299 - 2²⁰ = 1241056723 is a prime.

Together with 1242105301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1242105239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621052649 + 621052650.

It is an arithmetic number, because the mean of its divisors is an integer number (621052650).

Almost surely, 2^1242105299 is an apocalyptic number.

1242105299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242105299 is an equidigital number, since it uses as much as digits as its factorization.

1242105299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1242105299 is about 35243.5142827727. The cubic root of 1242105299 is about 1074.9447381724.

The spelling of 1242105299 in words is "one billion, two hundred forty-two million, one hundred five thousand, two hundred ninety-nine".