72120227 has 4 divisors (see below), whose sum is σ = 73481040. Its totient is φ = 70759416.

The previous prime is 72120163. The next prime is 72120241. The reversal of 72120227 is 72202127.

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

It is a cyclic number.

It is not a de Polignac number, because 72120227 - 2⁶ = 72120163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72120287) 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, 680327 + ... + 680432.

It is an arithmetic number, because the mean of its divisors is an integer number (18370260).

Almost surely, 2^72120227 is an apocalyptic number.

72120227 is a deficient number, since it is larger than the sum of its proper divisors (1360813).

72120227 is a wasteful number, since it uses less digits than its factorization.

72120227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360812.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 72120227 is about 8492.3628631848. The cubic root of 72120227 is about 416.2481934709.

The spelling of 72120227 in words is "seventy-two million, one hundred twenty thousand, two hundred twenty-seven".