272395721 has 6 divisors (see below), whose sum is σ = 294961230. Its totient is φ = 251442048.

The previous prime is 272395703. The next prime is 272395733. The reversal of 272395721 is 127593272.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14440000 + 257955721 = 3800^2 + 16061^2 .

It is not a de Polignac number, because 272395721 - 2¹⁸ = 272133577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (272395751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 805736 + ... + 806073.

It is an arithmetic number, because the mean of its divisors is an integer number (49160205).

Almost surely, 2^272395721 is an apocalyptic number.

It is an amenable number.

272395721 is a deficient number, since it is larger than the sum of its proper divisors (22565509).

272395721 is a wasteful number, since it uses less digits than its factorization.

272395721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611835 (or 1611822 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 272395721 is about 16504.4151971525. The cubic root of 272395721 is about 648.2364193789.

The spelling of 272395721 in words is "two hundred seventy-two million, three hundred ninety-five thousand, seven hundred twenty-one".