1391313 has 32 divisors (see below), whose sum is σ = 2442240. Its totient is φ = 682560.

The previous prime is 1391287. The next prime is 1391317. The reversal of 1391313 is 3131931.

It is not a de Polignac number, because 1391313 - 2⁵ = 1391281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1391313 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1391313.

It is not an unprimeable number, because it can be changed into a prime (1391317) 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 31 ways as a sum of consecutive naturals, for example, 4231 + ... + 4547.

It is an arithmetic number, because the mean of its divisors is an integer number (76320).

2^1391313 is an apocalyptic number.

It is an amenable number.

1391313 is a deficient number, since it is larger than the sum of its proper divisors (1050927).

1391313 is a wasteful number, since it uses less digits than its factorization.

1391313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its digits is 243, while the sum is 21.

The square root of 1391313 is about 1179.5393168521. The cubic root of 1391313 is about 111.6370318132.

The spelling of 1391313 in words is "one million, three hundred ninety-one thousand, three hundred thirteen".