72005143 has 8 divisors (see below), whose sum is σ = 84299040. Its totient is φ = 60213120.

The previous prime is 72005119. The next prime is 72005161. The reversal of 72005143 is 34150027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72005143 - 2⁹ = 72004631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72005443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125158 + ... + 125731.

It is an arithmetic number, because the mean of its divisors is an integer number (10537380).

Almost surely, 2^72005143 is an apocalyptic number.

72005143 is a deficient number, since it is larger than the sum of its proper divisors (12293897).

72005143 is a wasteful number, since it uses less digits than its factorization.

72005143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250937.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72005143 is about 8485.5844230082. The cubic root of 72005143 is about 416.0266698107.

The spelling of 72005143 in words is "seventy-two million, five thousand, one hundred forty-three".