742728071 has 4 divisors (see below), whose sum is σ = 749542200. Its totient is φ = 735913944.

The previous prime is 742728053. The next prime is 742728097. The reversal of 742728071 is 170827247.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742728071 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 (742721071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406901 + ... + 3407118.

It is an arithmetic number, because the mean of its divisors is an integer number (187385550).

Almost surely, 2^742728071 is an apocalyptic number.

742728071 is a deficient number, since it is larger than the sum of its proper divisors (6814129).

742728071 is a wasteful number, since it uses less digits than its factorization.

742728071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814128.

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

The square root of 742728071 is about 27253.0378306713. The cubic root of 742728071 is about 905.6143162782.

The spelling of 742728071 in words is "seven hundred forty-two million, seven hundred twenty-eight thousand, seventy-one".