72514861 has 2 divisors, whose sum is σ = 72514862. Its totient is φ = 72514860.

The previous prime is 72514831. The next prime is 72514867. The reversal of 72514861 is 16841527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 1196836 = 8445^2 + 1094^2 .

It is an emirp because it is prime and its reverse (16841527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72514861 - 2⁷ = 72514733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72514867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36257430 + 36257431.

It is an arithmetic number, because the mean of its divisors is an integer number (36257431).

Almost surely, 2^72514861 is an apocalyptic number.

It is an amenable number.

72514861 is a deficient number, since it is larger than the sum of its proper divisors (1).

72514861 is an equidigital number, since it uses as much as digits as its factorization.

72514861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 72514861 is about 8515.5658062163. The cubic root of 72514861 is about 417.0060344136.

The spelling of 72514861 in words is "seventy-two million, five hundred fourteen thousand, eight hundred sixty-one".