1318521 has 16 divisors (see below), whose sum is σ = 1862784. Its totient is φ = 827904.

The previous prime is 1318517. The next prime is 1318549. The reversal of 1318521 is 1258131.

It is not a de Polignac number, because 1318521 - 2² = 1318517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6595 + ... + 6791.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

2^1318521 is an apocalyptic number.

It is an amenable number.

1318521 is a deficient number, since it is larger than the sum of its proper divisors (544263).

1318521 is a wasteful number, since it uses less digits than its factorization.

1318521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 240, while the sum is 21.

The square root of 1318521 is about 1148.2686967779. The cubic root of 1318521 is about 109.6551458946.

The spelling of 1318521 in words is "one million, three hundred eighteen thousand, five hundred twenty-one".