1316391 has 8 divisors (see below), whose sum is σ = 1760640. Its totient is φ = 874872.

The previous prime is 1316389. The next prime is 1316401. The reversal of 1316391 is 1936131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1316391 - 2¹ = 1316389 is a prime.

1316391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (220080).

2^1316391 is an apocalyptic number.

1316391 is a deficient number, since it is larger than the sum of its proper divisors (444249).

1316391 is an equidigital number, since it uses as much as digits as its factorization.

1316391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365.

The product of its digits is 486, while the sum is 24.

The square root of 1316391 is about 1147.3408386351. The cubic root of 1316391 is about 109.5960667333.

The spelling of 1316391 in words is "one million, three hundred sixteen thousand, three hundred ninety-one".