72271243 has 12 divisors (see below), whose sum is σ = 80028760. Its totient is φ = 65213280.

The previous prime is 72271237. The next prime is 72271279. The reversal of 72271243 is 34217227.

It is not a de Polignac number, because 72271243 - 2⁵ = 72271211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72271343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14671 + ... + 18967.

Almost surely, 2^72271243 is an apocalyptic number.

72271243 is a deficient number, since it is larger than the sum of its proper divisors (7757517).

72271243 is a wasteful number, since it uses less digits than its factorization.

72271243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458 (or 4447 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 72271243 is about 8501.2494963976. The cubic root of 72271243 is about 416.5385249331.

The spelling of 72271243 in words is "seventy-two million, two hundred seventy-one thousand, two hundred forty-three".