72301273 has 4 divisors (see below), whose sum is σ = 78874128. Its totient is φ = 65728420.

The previous prime is 72301249. The next prime is 72301279. The reversal of 72301273 is 37210327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72301273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72301279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286411 + ... + 3286432.

It is an arithmetic number, because the mean of its divisors is an integer number (19718532).

Almost surely, 2^72301273 is an apocalyptic number.

It is an amenable number.

72301273 is a deficient number, since it is larger than the sum of its proper divisors (6572855).

72301273 is a wasteful number, since it uses less digits than its factorization.

72301273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6572854.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 72301273 is about 8503.0155239186. The cubic root of 72301273 is about 416.5962100245.

The spelling of 72301273 in words is "seventy-two million, three hundred one thousand, two hundred seventy-three".