1319391 has 12 divisors (see below), whose sum is σ = 1967680. Its totient is φ = 851040.

The previous prime is 1319389. The next prime is 1319399. The reversal of 1319391 is 1939131.

It is not a de Polignac number, because 1319391 - 2¹ = 1319389 is a prime.

It is a super-2 number, since 2×1319391² = 3481585221762, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

1319391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319399) 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 11 ways as a sum of consecutive naturals, for example, 2086 + ... + 2643.

2^1319391 is an apocalyptic number.

1319391 is a deficient number, since it is larger than the sum of its proper divisors (648289).

1319391 is a wasteful number, since it uses less digits than its factorization.

1319391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766 (or 4763 counting only the distinct ones).

The product of its digits is 729, while the sum is 27.

The square root of 1319391 is about 1148.6474655002. The cubic root of 1319391 is about 109.6792585183.

The spelling of 1319391 in words is "one million, three hundred nineteen thousand, three hundred ninety-one".