72157043 has 8 divisors (see below), whose sum is σ = 82991712. Its totient is φ = 61454016.

The previous prime is 72157037. The next prime is 72157073. The reversal of 72157043 is 34075127.

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 72157043 - 2⁶ = 72156979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72156997 and 72157015.

It is not an unprimeable number, because it can be changed into a prime (72157013) 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, 31730 + ... + 33927.

It is an arithmetic number, because the mean of its divisors is an integer number (10373964).

Almost surely, 2^72157043 is an apocalyptic number.

72157043 is a deficient number, since it is larger than the sum of its proper divisors (10834669).

72157043 is a wasteful number, since it uses less digits than its factorization.

72157043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65821.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72157043 is about 8494.5301812402. The cubic root of 72157043 is about 416.3190103426.

The spelling of 72157043 in words is "seventy-two million, one hundred fifty-seven thousand, forty-three".