742721297 has 2 divisors, whose sum is σ = 742721298. Its totient is φ = 742721296.

The previous prime is 742721237. The next prime is 742721393. The reversal of 742721297 is 792127247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382632721 + 360088576 = 19561^2 + 18976^2 .

It is a cyclic number.

It is not a de Polignac number, because 742721297 - 2²⁸ = 474285841 is a prime.

It is not a weakly prime, because it can be changed into another prime (742721207) 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, 371360648 + 371360649.

It is an arithmetic number, because the mean of its divisors is an integer number (371360649).

Almost surely, 2^742721297 is an apocalyptic number.

It is an amenable number.

742721297 is a deficient number, since it is larger than the sum of its proper divisors (1).

742721297 is an equidigital number, since it uses as much as digits as its factorization.

742721297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 742721297 is about 27252.9135506646. The cubic root of 742721297 is about 905.6115630723.

The spelling of 742721297 in words is "seven hundred forty-two million, seven hundred twenty-one thousand, two hundred ninety-seven".