1291317 has 8 divisors (see below), whose sum is σ = 1729920. Its totient is φ = 856800.

The previous prime is 1291313. The next prime is 1291321. The reversal of 1291317 is 7131921.

It is an interprime number because it is at equal distance from previous prime (1291313) and next prime (1291321).

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

It is not a de Polignac number, because 1291317 - 2² = 1291313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291313) 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 7 ways as a sum of consecutive naturals, for example, 184 + ... + 1617.

It is an arithmetic number, because the mean of its divisors is an integer number (216240).

2^1291317 is an apocalyptic number.

It is an amenable number.

1291317 is a deficient number, since it is larger than the sum of its proper divisors (438603).

1291317 is a wasteful number, since it uses less digits than its factorization.

1291317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043.

The product of its digits is 378, while the sum is 24.

The square root of 1291317 is about 1136.3612981794. The cubic root of 1291317 is about 108.8957564660.

The spelling of 1291317 in words is "one million, two hundred ninety-one thousand, three hundred seventeen".