1272109 has 2 divisors, whose sum is σ = 1272110. Its totient is φ = 1272108.

The previous prime is 1272091. The next prime is 1272113. The reversal of 1272109 is 9012721.

Together with previous prime (1272091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1258884 + 13225 = 1122^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272109 - 2⁹ = 1271597 is a prime.

It is a super-2 number, since 2×1272109² = 3236522615762, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1272109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636054 + 636055.

It is an arithmetic number, because the mean of its divisors is an integer number (636055).

2^1272109 is an apocalyptic number.

It is an amenable number.

1272109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272109 is an equidigital number, since it uses as much as digits as its factorization.

1272109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1272109 is about 1127.8780962498. The cubic root of 1272109 is about 108.3531251151.

The spelling of 1272109 in words is "one million, two hundred seventy-two thousand, one hundred nine".