1018521 has 32 divisors (see below), whose sum is σ = 1831680. Its totient is φ = 546048.

The previous prime is 1018513. The next prime is 1018543. The reversal of 1018521 is 1258101.

It is not a de Polignac number, because 1018521 - 2³ = 1018513 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

1018521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1018494 and 1018503.

It is not an unprimeable number, because it can be changed into a prime (1018021) 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 31 ways as a sum of consecutive naturals, for example, 3055 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (57240).

2^1018521 is an apocalyptic number.

It is an amenable number.

1018521 is a deficient number, since it is larger than the sum of its proper divisors (813159).

1018521 is a wasteful number, since it uses less digits than its factorization.

1018521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1018521 is about 1009.2180141080. The cubic root of 1018521 is about 100.6135939903.

The spelling of 1018521 in words is "one million, eighteen thousand, five hundred twenty-one".