72306143 has 12 divisors (see below), whose sum is σ = 89482608. Its totient is φ = 57208320.

The previous prime is 72306137. The next prime is 72306149. The reversal of 72306143 is 34160327.

It is an interprime number because it is at equal distance from previous prime (72306137) and next prime (72306149).

It is not a de Polignac number, because 72306143 - 2⁶ = 72306079 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72306149) 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 11 ways as a sum of consecutive naturals, for example, 29378 + ... + 31743.

It is an arithmetic number, because the mean of its divisors is an integer number (7456884).

Almost surely, 2^72306143 is an apocalyptic number.

72306143 is a deficient number, since it is larger than the sum of its proper divisors (17176465).

72306143 is a wasteful number, since it uses less digits than its factorization.

72306143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61154 (or 61141 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 72306143 is about 8503.3018880903. The cubic root of 72306143 is about 416.6055633775.

The spelling of 72306143 in words is "seventy-two million, three hundred six thousand, one hundred forty-three".