1317403 has 4 divisors (see below), whose sum is σ = 1386760. Its totient is φ = 1248048.

The previous prime is 1317401. The next prime is 1317409. The reversal of 1317403 is 3047131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3047131 = 17 ⋅179243.

It is a cyclic number.

It is not a de Polignac number, because 1317403 - 2¹ = 1317401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69337 = 1317403 / (1 + 3 + 1 + 7 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317401) 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, 34650 + ... + 34687.

It is an arithmetic number, because the mean of its divisors is an integer number (346690).

2^1317403 is an apocalyptic number.

1317403 is a deficient number, since it is larger than the sum of its proper divisors (69357).

1317403 is an equidigital number, since it uses as much as digits as its factorization.

1317403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69356.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 1317403 is about 1147.7817736835. The cubic root of 1317403 is about 109.6241442093.

The spelling of 1317403 in words is "one million, three hundred seventeen thousand, four hundred three".