742246810121 has 2 divisors, whose sum is σ = 742246810122. Its totient is φ = 742246810120.

The previous prime is 742246810117. The next prime is 742246810141. The reversal of 742246810121 is 121018642247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 599014081600 + 143232728521 = 773960^2 + 378461^2 .

It is a cyclic number.

It is not a de Polignac number, because 742246810121 - 2² = 742246810117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (742246810141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371123405060 + 371123405061.

It is an arithmetic number, because the mean of its divisors is an integer number (371123405061).

Almost surely, 2^742246810121 is an apocalyptic number.

It is an amenable number.

742246810121 is a deficient number, since it is larger than the sum of its proper divisors (1).

742246810121 is an equidigital number, since it uses as much as digits as its factorization.

742246810121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 742246810121 in words is "seven hundred forty-two billion, two hundred forty-six million, eight hundred ten thousand, one hundred twenty-one".