72247 has 4 divisors (see below), whose sum is σ = 82576. Its totient is φ = 61920.

The previous prime is 72229. The next prime is 72251. The reversal of 72247 is 74227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74227 = 199 ⋅373.

It is a cyclic number.

It is not a de Polignac number, because 72247 - 2¹¹ = 70199 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 (72227) 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, 5154 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (20644).

2⁷²²⁴⁷ is an apocalyptic number.

72247 is a deficient number, since it is larger than the sum of its proper divisors (10329).

72247 is a wasteful number, since it uses less digits than its factorization.

72247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328.

The product of its digits is 784, while the sum is 22.

The square root of 72247 is about 268.7880205664. The cubic root of 72247 is about 41.6491944521.

The spelling of 72247 in words is "seventy-two thousand, two hundred forty-seven", and thus it is an iban number.