1317520 has 40 divisors (see below), whose sum is σ = 3142656. Its totient is φ = 513408.

The previous prime is 1317493. The next prime is 1317521. The reversal of 1317520 is 257131.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1317521) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3249 + ... + 3631.

2^1317520 is an apocalyptic number.

1317520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571328).

1317520 is an abundant number, since it is smaller than the sum of its proper divisors (1825136).

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

1317520 is a wasteful number, since it uses less digits than its factorization.

1317520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1317520 is about 1147.8327404287. The cubic root of 1317520 is about 109.6273893932.

The spelling of 1317520 in words is "one million, three hundred seventeen thousand, five hundred twenty".