272805121 has 2 divisors, whose sum is σ = 272805122. Its totient is φ = 272805120.

The previous prime is 272805119. The next prime is 272805133. The reversal of 272805121 is 121508272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208484721 + 64320400 = 14439^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 272805121 - 2¹ = 272805119 is a prime.

Together with 272805119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 272805121.

It is not a weakly prime, because it can be changed into another prime (272805101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136402560 + 136402561.

It is an arithmetic number, because the mean of its divisors is an integer number (136402561).

Almost surely, 2^272805121 is an apocalyptic number.

It is an amenable number.

272805121 is a deficient number, since it is larger than the sum of its proper divisors (1).

272805121 is an equidigital number, since it uses as much as digits as its factorization.

272805121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 272805121 is about 16516.8132822285. The cubic root of 272805121 is about 648.5610147190.

The spelling of 272805121 in words is "two hundred seventy-two million, eight hundred five thousand, one hundred twenty-one".