72285321 has 8 divisors (see below), whose sum is σ = 96525504. Its totient is φ = 48117680.

The previous prime is 72285319. The next prime is 72285331. The reversal of 72285321 is 12358227.

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 72285321 - 2¹ = 72285319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72285331) 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, 15765 + ... + 19826.

It is an arithmetic number, because the mean of its divisors is an integer number (12065688).

Almost surely, 2^72285321 is an apocalyptic number.

It is an amenable number.

72285321 is a deficient number, since it is larger than the sum of its proper divisors (24240183).

72285321 is a wasteful number, since it uses less digits than its factorization.

72285321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36271.

The product of its digits is 6720, while the sum is 30.

The square root of 72285321 is about 8502.0774520114. The cubic root of 72285321 is about 416.5655695703.

The spelling of 72285321 in words is "seventy-two million, two hundred eighty-five thousand, three hundred twenty-one".