272606021 has 4 divisors (see below), whose sum is σ = 275669100. Its totient is φ = 269542944.

The previous prime is 272605943. The next prime is 272606023. The reversal of 272606021 is 120606272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50268100 + 222337921 = 7090^2 + 14911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272606021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272606023) 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, 1531406 + ... + 1531583.

It is an arithmetic number, because the mean of its divisors is an integer number (68917275).

Almost surely, 2^272606021 is an apocalyptic number.

It is an amenable number.

272606021 is a deficient number, since it is larger than the sum of its proper divisors (3063079).

272606021 is an equidigital number, since it uses as much as digits as its factorization.

272606021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063078.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 272606021 is about 16510.7849904237. The cubic root of 272606021 is about 648.4031976369.

The spelling of 272606021 in words is "two hundred seventy-two million, six hundred six thousand, twenty-one".