1312271 has 4 divisors (see below), whose sum is σ = 1317192. Its totient is φ = 1307352.

The previous prime is 1312237. The next prime is 1312277. The reversal of 1312271 is 1722131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312271 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 (1312277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (329298).

2^1312271 is an apocalyptic number.

1312271 is a deficient number, since it is larger than the sum of its proper divisors (4921).

1312271 is an equidigital number, since it uses as much as digits as its factorization.

1312271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920.

The product of its digits is 84, while the sum is 17.

The square root of 1312271 is about 1145.5439755854. The cubic root of 1312271 is about 109.4816104450.

The spelling of 1312271 in words is "one million, three hundred twelve thousand, two hundred seventy-one".