1242758347 has 2 divisors, whose sum is σ = 1242758348. Its totient is φ = 1242758346.

The previous prime is 1242758311. The next prime is 1242758357. The reversal of 1242758347 is 7438572421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242758347 - 2⁷ = 1242758219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242758357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621379173 + 621379174.

It is an arithmetic number, because the mean of its divisors is an integer number (621379174).

Almost surely, 2^1242758347 is an apocalyptic number.

1242758347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242758347 is an equidigital number, since it uses as much as digits as its factorization.

1242758347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 43.

The square root of 1242758347 is about 35252.7778621770. Note that the first 3 decimals coincide. The cubic root of 1242758347 is about 1075.1330924453.

The spelling of 1242758347 in words is "one billion, two hundred forty-two million, seven hundred fifty-eight thousand, three hundred forty-seven".