1317320 has 16 divisors (see below), whose sum is σ = 2964060. Its totient is φ = 526912.

The previous prime is 1317319. The next prime is 1317359. The reversal of 1317320 is 237131.

1317320 = T₁₄₀ + T₁₄₁ + ... + T₂₁₉.

It can be written as a sum of positive squares in 2 ways, for example, as 1162084 + 155236 = 1078^2 + 394^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16427 + ... + 16506.

2^1317320 is an apocalyptic number.

1317320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317320 is an abundant number, since it is smaller than the sum of its proper divisors (1646740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317320 is a wasteful number, since it uses less digits than its factorization.

1317320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32944 (or 32940 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1317320 is about 1147.7456164151. The cubic root of 1317320 is about 109.6218419537.

The spelling of 1317320 in words is "one million, three hundred seventeen thousand, three hundred twenty".