742688417 has 4 divisors (see below), whose sum is σ = 756701460. Its totient is φ = 728675376.

The previous prime is 742688413. The next prime is 742688447. The reversal of 742688417 is 714886247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 714886247 = 79 ⋅9049193.

It can be written as a sum of positive squares in 2 ways, for example, as 576768256 + 165920161 = 24016^2 + 12881^2 .

It is not a de Polignac number, because 742688417 - 2² = 742688413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742688413) 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 in 3 ways as a sum of consecutive naturals, for example, 7006442 + ... + 7006547.

It is an arithmetic number, because the mean of its divisors is an integer number (189175365).

Almost surely, 2^742688417 is an apocalyptic number.

It is an amenable number.

742688417 is a deficient number, since it is larger than the sum of its proper divisors (14013043).

742688417 is a wasteful number, since it uses less digits than its factorization.

742688417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14013042.

The product of its digits is 602112, while the sum is 47.

The square root of 742688417 is about 27252.3103057337. The cubic root of 742688417 is about 905.5981991776.

The spelling of 742688417 in words is "seven hundred forty-two million, six hundred eighty-eight thousand, four hundred seventeen".