4272809 has 2 divisors, whose sum is σ = 4272810. Its totient is φ = 4272808.

The previous prime is 4272803. The next prime is 4272811. The reversal of 4272809 is 9082724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3341584 + 931225 = 1828^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 4272809 - 2⁸ = 4272553 is a prime.

Together with 4272811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4272803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2136404 + 2136405.

It is an arithmetic number, because the mean of its divisors is an integer number (2136405).

Almost surely, 2^4272809 is an apocalyptic number.

It is an amenable number.

4272809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4272809 is an equidigital number, since it uses as much as digits as its factorization.

4272809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 4272809 is about 2067.0774054205. The cubic root of 4272809 is about 162.2698469631.

The spelling of 4272809 in words is "four million, two hundred seventy-two thousand, eight hundred nine".