742087217 has 2 divisors, whose sum is σ = 742087218. Its totient is φ = 742087216.

The previous prime is 742087141. The next prime is 742087219. The reversal of 742087217 is 712780247.

It is a happy number.

742087217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451180081 + 290907136 = 21241^2 + 17056^2 .

It is a cyclic number.

It is not a de Polignac number, because 742087217 - 2¹⁶ = 742021681 is a prime.

Together with 742087219, 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 (742087219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371043608 + 371043609.

It is an arithmetic number, because the mean of its divisors is an integer number (371043609).

Almost surely, 2^742087217 is an apocalyptic number.

It is an amenable number.

742087217 is a deficient number, since it is larger than the sum of its proper divisors (1).

742087217 is an equidigital number, since it uses as much as digits as its factorization.

742087217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 742087217 is about 27241.2778151099. The cubic root of 742087217 is about 905.3537751818.

The spelling of 742087217 in words is "seven hundred forty-two million, eighty-seven thousand, two hundred seventeen".