72581141 has 2 divisors, whose sum is σ = 72581142. Its totient is φ = 72581140.

The previous prime is 72581063. The next prime is 72581147. The reversal of 72581141 is 14118527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71487025 + 1094116 = 8455^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 72581141 - 2²⁶ = 5472277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72581147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36290570 + 36290571.

It is an arithmetic number, because the mean of its divisors is an integer number (36290571).

Almost surely, 2^72581141 is an apocalyptic number.

It is an amenable number.

72581141 is a deficient number, since it is larger than the sum of its proper divisors (1).

72581141 is an equidigital number, since it uses as much as digits as its factorization.

72581141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 29.

The square root of 72581141 is about 8519.4566141275. The cubic root of 72581141 is about 417.1330462791.

Adding to 72581141 its reverse (14118527), we get a palindrome (86699668).

The spelling of 72581141 in words is "seventy-two million, five hundred eighty-one thousand, one hundred forty-one".