742506173 has 4 divisors (see below), whose sum is σ = 742657500. Its totient is φ = 742354848.

The previous prime is 742506137. The next prime is 742506211. The reversal of 742506173 is 371605247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371605247 = 13 ⋅28585019.

It can be written as a sum of positive squares in 2 ways, for example, as 714065284 + 28440889 = 26722^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 742506173 - 2¹⁸ = 742244029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742506113) 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 in 3 ways as a sum of consecutive naturals, for example, 68048 + ... + 78201.

It is an arithmetic number, because the mean of its divisors is an integer number (185664375).

Almost surely, 2^742506173 is an apocalyptic number.

It is an amenable number.

742506173 is a deficient number, since it is larger than the sum of its proper divisors (151327).

742506173 is a wasteful number, since it uses less digits than its factorization.

742506173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151326.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 742506173 is about 27248.9664574640. The cubic root of 742506173 is about 905.5241199560.

The spelling of 742506173 in words is "seven hundred forty-two million, five hundred six thousand, one hundred seventy-three".