72392021 has 8 divisors (see below), whose sum is σ = 78355200. Its totient is φ = 66485232.

The previous prime is 72392009. The next prime is 72392029. The reversal of 72392021 is 12029327.

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 72392021 - 2¹⁴ = 72375637 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 (72392029) 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, 11405 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (9794400).

Almost surely, 2^72392021 is an apocalyptic number.

It is an amenable number.

72392021 is a deficient number, since it is larger than the sum of its proper divisors (5963179).

72392021 is a wasteful number, since it uses less digits than its factorization.

72392021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28195.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72392021 is about 8508.3500750733. The cubic root of 72392021 is about 416.7704322541.

The spelling of 72392021 in words is "seventy-two million, three hundred ninety-two thousand, twenty-one".