1316291 has 4 divisors (see below), whose sum is σ = 1358784. Its totient is φ = 1273800.

The previous prime is 1316279. The next prime is 1316299. The reversal of 1316291 is 1926131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1926131 = 349 ⋅5519.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316291 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316299) 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, 21200 + ... + 21261.

It is an arithmetic number, because the mean of its divisors is an integer number (339696).

2^1316291 is an apocalyptic number.

1316291 is a deficient number, since it is larger than the sum of its proper divisors (42493).

1316291 is an equidigital number, since it uses as much as digits as its factorization.

1316291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42492.

The product of its digits is 324, while the sum is 23.

The square root of 1316291 is about 1147.2972587782. The cubic root of 1316291 is about 109.5932914980.

The spelling of 1316291 in words is "one million, three hundred sixteen thousand, two hundred ninety-one".