1317528 has 48 divisors (see below), whose sum is σ = 3697200. Its totient is φ = 423360.

The previous prime is 1317523. The next prime is 1317541. The reversal of 1317528 is 8257131.

1317528 is a `hidden beast` number, since 131 + 7 + 528 = 666.

It is an Ulam number.

It is a congruent number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1773 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (77025).

2^1317528 is an apocalyptic number.

1317528 is a gapful number since it is divisible by the number (18) 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 1317528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848600).

1317528 is an abundant number, since it is smaller than the sum of its proper divisors (2379672).

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

1317528 is a wasteful number, since it uses less digits than its factorization.

1317528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 665 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1317528 is about 1147.8362252517. The cubic root of 1317528 is about 109.6276112791.

It can be divided in two parts, 13175 and 28, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 1317528 in words is "one million, three hundred seventeen thousand, five hundred twenty-eight".