1271089 has 2 divisors, whose sum is σ = 1271090. Its totient is φ = 1271088.

The previous prime is 1271087. The next prime is 1271111. The reversal of 1271089 is 9801721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 255025 = 1008^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271089 - 2¹ = 1271087 is a prime.

Together with 1271087, it forms a pair of twin primes.

It is a Chen prime.

1271089 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1271087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635544 + 635545.

It is an arithmetic number, because the mean of its divisors is an integer number (635545).

2^1271089 is an apocalyptic number.

It is an amenable number.

1271089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271089 is an equidigital number, since it uses as much as digits as its factorization.

1271089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1271089 is about 1127.4258290460. The cubic root of 1271089 is about 108.3241575397.

The spelling of 1271089 in words is "one million, two hundred seventy-one thousand, eighty-nine".