272160721 has 4 divisors (see below), whose sum is σ = 311040832. Its totient is φ = 233280612.

The previous prime is 272160709. The next prime is 272160727. The reversal of 272160721 is 127061272.

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 272160721 - 2⁹ = 272160209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 272160721.

It is not an unprimeable number, because it can be changed into a prime (272160727) 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, 19440045 + ... + 19440058.

It is an arithmetic number, because the mean of its divisors is an integer number (77760208).

Almost surely, 2^272160721 is an apocalyptic number.

It is an amenable number.

272160721 is a deficient number, since it is larger than the sum of its proper divisors (38880111).

272160721 is an equidigital number, since it uses as much as digits as its factorization.

272160721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38880110.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 272160721 is about 16497.2943539236. The cubic root of 272160721 is about 648.0499512185.

The spelling of 272160721 in words is "two hundred seventy-two million, one hundred sixty thousand, seven hundred twenty-one".