1317506 has 4 divisors (see below), whose sum is σ = 1976262. Its totient is φ = 658752.

The previous prime is 1317493. The next prime is 1317521. The reversal of 1317506 is 6057131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6057131 = 2311 ⋅2621.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 15625 = 1141^2 + 125^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329375 + ... + 329378.

2^1317506 is an apocalyptic number.

1317506 is a deficient number, since it is larger than the sum of its proper divisors (658756).

1317506 is an equidigital number, since it uses as much as digits as its factorization.

1317506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658755.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 1317506 is about 1147.8266419630. The cubic root of 1317506 is about 109.6270010907.

The spelling of 1317506 in words is "one million, three hundred seventeen thousand, five hundred six".