72021143 has 8 divisors (see below), whose sum is σ = 73288416. Its totient is φ = 70761600.

The previous prime is 72021139. The next prime is 72021149. The reversal of 72021143 is 34112027.

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 72021143 - 2² = 72021139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72021149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18758 + ... + 22268.

It is an arithmetic number, because the mean of its divisors is an integer number (9161052).

Almost surely, 2^72021143 is an apocalyptic number.

72021143 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

72021143 is a deficient number, since it is larger than the sum of its proper divisors (1267273).

72021143 is a wasteful number, since it uses less digits than its factorization.

72021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 72021143 is about 8486.5271460121. The cubic root of 72021143 is about 416.0574821179.

The spelling of 72021143 in words is "seventy-two million, twenty-one thousand, one hundred forty-three".