1271311 has 12 divisors (see below), whose sum is σ = 1392552. Its totient is φ = 1159808.

The previous prime is 1271299. The next prime is 1271317. The reversal of 1271311 is 1131721.

It is not a de Polignac number, because 1271311 - 2⁷ = 1271183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271317) 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 in 11 ways as a sum of consecutive naturals, for example, 15276 + ... + 15358.

It is an arithmetic number, because the mean of its divisors is an integer number (116046).

2^1271311 is an apocalyptic number.

1271311 is a deficient number, since it is larger than the sum of its proper divisors (121241).

1271311 is an equidigital number, since it uses as much as digits as its factorization.

1271311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 153 counting only the distinct ones).

The product of its digits is 42, while the sum is 16.

The square root of 1271311 is about 1127.5242791177. The cubic root of 1271311 is about 108.3304635663.

The spelling of 1271311 in words is "one million, two hundred seventy-one thousand, three hundred eleven".