1242309073 has 2 divisors, whose sum is σ = 1242309074. Its totient is φ = 1242309072.

The previous prime is 1242309043. The next prime is 1242309083. The reversal of 1242309073 is 3709032421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241364289 + 944784 = 35233^2 + 972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242309073 - 2¹³ = 1242300881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242309023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621154536 + 621154537.

It is an arithmetic number, because the mean of its divisors is an integer number (621154537).

Almost surely, 2^1242309073 is an apocalyptic number.

It is an amenable number.

1242309073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242309073 is an equidigital number, since it uses as much as digits as its factorization.

1242309073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1242309073 is about 35246.4051074716. The cubic root of 1242309073 is about 1075.0035184309.

The spelling of 1242309073 in words is "one billion, two hundred forty-two million, three hundred nine thousand, seventy-three".