72162145 has 16 divisors (see below), whose sum is σ = 95103360. Its totient is φ = 52128000.

The previous prime is 72162143. The next prime is 72162169. The reversal of 72162145 is 54126127.

It is not a de Polignac number, because 72162145 - 2¹ = 72162143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72162143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3961 + ... + 12649.

It is an arithmetic number, because the mean of its divisors is an integer number (5943960).

Almost surely, 2^72162145 is an apocalyptic number.

It is an amenable number.

72162145 is a deficient number, since it is larger than the sum of its proper divisors (22941215).

72162145 is a wasteful number, since it uses less digits than its factorization.

72162145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856.

The product of its digits is 3360, while the sum is 28.

The square root of 72162145 is about 8494.8304868314. The cubic root of 72162145 is about 416.3288223187.

The spelling of 72162145 in words is "seventy-two million, one hundred sixty-two thousand, one hundred forty-five".