272106721 has 4 divisors (see below), whose sum is σ = 283937472. Its totient is φ = 260275972.

The previous prime is 272106701. The next prime is 272106727. The reversal of 272106721 is 127601272.

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 272106721 - 2⁵ = 272106689 is a prime.

It is a super-2 number, since 2×272106721² = 148084135226743682, which contains 22 as substring.

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 272106721.

It is not an unprimeable number, because it can be changed into a prime (272106727) 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, 5915341 + ... + 5915386.

It is an arithmetic number, because the mean of its divisors is an integer number (70984368).

Almost surely, 2^272106721 is an apocalyptic number.

It is an amenable number.

272106721 is a deficient number, since it is larger than the sum of its proper divisors (11830751).

272106721 is a wasteful number, since it uses less digits than its factorization.

272106721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11830750.

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

The square root of 272106721 is about 16495.6576407247. The cubic root of 272106721 is about 648.0070880505.

Adding to 272106721 its reverse (127601272), we get a palindrome (399707993).

The spelling of 272106721 in words is "two hundred seventy-two million, one hundred six thousand, seven hundred twenty-one".