1272091 has 2 divisors, whose sum is σ = 1272092. Its totient is φ = 1272090.

The previous prime is 1272079. The next prime is 1272109. The reversal of 1272091 is 1902721.

Together with next prime (1272109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1272091 - 2¹⁵ = 1239323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272001) 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, 636045 + 636046.

It is an arithmetic number, because the mean of its divisors is an integer number (636046).

2^1272091 is an apocalyptic number.

1272091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272091 is an equidigital number, since it uses as much as digits as its factorization.

1272091 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 1272091 is about 1127.8701166358. The cubic root of 1272091 is about 108.3526140568.

The spelling of 1272091 in words is "one million, two hundred seventy-two thousand, ninety-one".