72143345 has 16 divisors (see below), whose sum is σ = 88231680. Its totient is φ = 56617344.

The previous prime is 72143327. The next prime is 72143369. The reversal of 72143345 is 54334127.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72143345 - 2⁸ = 72143089 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 86822 + ... + 87648.

It is an arithmetic number, because the mean of its divisors is an integer number (5514480).

Almost surely, 2^72143345 is an apocalyptic number.

It is an amenable number.

72143345 is a deficient number, since it is larger than the sum of its proper divisors (16088335).

72143345 is a wasteful number, since it uses less digits than its factorization.

72143345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 10080, while the sum is 29.

The square root of 72143345 is about 8493.7238594153. The cubic root of 72143345 is about 416.2926645721.

The spelling of 72143345 in words is "seventy-two million, one hundred forty-three thousand, three hundred forty-five".