1311347 has 4 divisors (see below), whose sum is σ = 1339296. Its totient is φ = 1283400.

The previous prime is 1311341. The next prime is 1311353. The reversal of 1311347 is 7431131.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1311341) and next prime (1311353).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311341) 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, 13904 + ... + 13997.

It is an arithmetic number, because the mean of its divisors is an integer number (334824).

2^1311347 is an apocalyptic number.

1311347 is a deficient number, since it is larger than the sum of its proper divisors (27949).

1311347 is an equidigital number, since it uses as much as digits as its factorization.

1311347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27948.

The product of its digits is 252, while the sum is 20.

The square root of 1311347 is about 1145.1406027209. The cubic root of 1311347 is about 109.4559082436.

Adding to 1311347 its reverse (7431131), we get a palindrome (8742478).

The spelling of 1311347 in words is "one million, three hundred eleven thousand, three hundred forty-seven".