742720417 has 2 divisors, whose sum is σ = 742720418. Its totient is φ = 742720416.

The previous prime is 742720409. The next prime is 742720427. The reversal of 742720417 is 714027247.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611869696 + 130850721 = 24736^2 + 11439^2 .

It is a cyclic number.

It is not a de Polignac number, because 742720417 - 2³ = 742720409 is a prime.

It is equal to p_38347450 and since 742720417 and 38347450 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (742720427) 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, 371360208 + 371360209.

It is an arithmetic number, because the mean of its divisors is an integer number (371360209).

Almost surely, 2^742720417 is an apocalyptic number.

It is an amenable number.

742720417 is a deficient number, since it is larger than the sum of its proper divisors (1).

742720417 is an equidigital number, since it uses as much as digits as its factorization.

742720417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 742720417 is about 27252.8974055971. The cubic root of 742720417 is about 905.6112054062.

The spelling of 742720417 in words is "seven hundred forty-two million, seven hundred twenty thousand, four hundred seventeen".