72265161 has 8 divisors (see below), whose sum is σ = 96473920. Its totient is φ = 48116592.

The previous prime is 72265153. The next prime is 72265163. The reversal of 72265161 is 16156227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72265161 - 2³ = 72265153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72265163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12166 + ... + 17103.

It is an arithmetic number, because the mean of its divisors is an integer number (12059240).

Almost surely, 2^72265161 is an apocalyptic number.

It is an amenable number.

72265161 is a deficient number, since it is larger than the sum of its proper divisors (24208759).

72265161 is a wasteful number, since it uses less digits than its factorization.

72265161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30095.

The product of its digits is 5040, while the sum is 30.

The square root of 72265161 is about 8500.8917767491. The cubic root of 72265161 is about 416.5268399794.

The spelling of 72265161 in words is "seventy-two million, two hundred sixty-five thousand, one hundred sixty-one".