72865143 has 16 divisors (see below), whose sum is σ = 116252640. Its totient is φ = 44839872.

The previous prime is 72865141. The next prime is 72865151. The reversal of 72865143 is 34156827.

It is not a de Polignac number, because 72865143 - 2¹ = 72865141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72865098 and 72865107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72865141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103446 + ... + 104147.

It is an arithmetic number, because the mean of its divisors is an integer number (7265790).

Almost surely, 2^72865143 is an apocalyptic number.

72865143 is a deficient number, since it is larger than the sum of its proper divisors (43387497).

72865143 is a wasteful number, since it uses less digits than its factorization.

72865143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207615 (or 207609 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 72865143 is about 8536.1081881616. The cubic root of 72865143 is about 417.6764033973.

The spelling of 72865143 in words is "seventy-two million, eight hundred sixty-five thousand, one hundred forty-three".