72048161 has 2 divisors, whose sum is σ = 72048162. Its totient is φ = 72048160.

The previous prime is 72048157. The next prime is 72048199. The reversal of 72048161 is 16184027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69222400 + 2825761 = 8320^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 72048161 - 2² = 72048157 is a prime.

It is not a weakly prime, because it can be changed into another prime (72048761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36024080 + 36024081.

It is an arithmetic number, because the mean of its divisors is an integer number (36024081).

Almost surely, 2^72048161 is an apocalyptic number.

It is an amenable number.

72048161 is a deficient number, since it is larger than the sum of its proper divisors (1).

72048161 is an equidigital number, since it uses as much as digits as its factorization.

72048161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 72048161 is about 8488.1188139658. The cubic root of 72048161 is about 416.1095021925.

The spelling of 72048161 in words is "seventy-two million, forty-eight thousand, one hundred sixty-one".