272428721 has 4 divisors (see below), whose sum is σ = 284273472. Its totient is φ = 260583972.

The previous prime is 272428703. The next prime is 272428729. The reversal of 272428721 is 127824272.

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 not a de Polignac number, because 272428721 - 2¹⁰ = 272427697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (272428729) 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, 5922341 + ... + 5922386.

It is an arithmetic number, because the mean of its divisors is an integer number (71068368).

Almost surely, 2^272428721 is an apocalyptic number.

It is an amenable number.

272428721 is a deficient number, since it is larger than the sum of its proper divisors (11844751).

272428721 is a wasteful number, since it uses less digits than its factorization.

272428721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11844750.

The product of its digits is 25088, while the sum is 35.

The square root of 272428721 is about 16505.4148993595. The cubic root of 272428721 is about 648.2625956810.

The spelling of 272428721 in words is "two hundred seventy-two million, four hundred twenty-eight thousand, seven hundred twenty-one".