72245 has 4 divisors (see below), whose sum is σ = 86700. Its totient is φ = 57792.

The previous prime is 72229. The next prime is 72251. The reversal of 72245 is 54227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54227 = 211 ⋅257.

It can be written as a sum of positive squares in 2 ways, for example, as 54289 + 17956 = 233^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 72245 - 2⁴ = 72229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7220 + ... + 7229.

It is an arithmetic number, because the mean of its divisors is an integer number (21675).

2⁷²²⁴⁵ is an apocalyptic number.

It is an amenable number.

72245 is a deficient number, since it is larger than the sum of its proper divisors (14455).

72245 is a wasteful number, since it uses less digits than its factorization.

72245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14454.

The product of its digits is 560, while the sum is 20.

The square root of 72245 is about 268.7843001367. The cubic root of 72245 is about 41.6488101263.

It can be divided in two parts, 722 and 45, that added together give a palindrome (767).

The spelling of 72245 in words is "seventy-two thousand, two hundred forty-five".