742721273 has 36 divisors (see below), whose sum is σ = 905112576. Its totient is φ = 607521600.

The previous prime is 742721237. The next prime is 742721297. The reversal of 742721273 is 372127247.

It is not a de Polignac number, because 742721273 - 2¹⁰ = 742720249 is a prime.

It is a Duffinian number.

Its product of digits (32928) is a multiple of the sum of its prime factors (294).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (742121273) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5848136 + ... + 5848262.

It is an arithmetic number, because the mean of its divisors is an integer number (25142016).

Almost surely, 2^742721273 is an apocalyptic number.

It is an amenable number.

742721273 is a deficient number, since it is larger than the sum of its proper divisors (162391303).

742721273 is a wasteful number, since it uses less digits than its factorization.

742721273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 246 counting only the distinct ones).

The product of its digits is 32928, while the sum is 35.

The square root of 742721273 is about 27252.9131103447. The cubic root of 742721273 is about 905.6115533177.

The spelling of 742721273 in words is "seven hundred forty-two million, seven hundred twenty-one thousand, two hundred seventy-three".