1821536 has 12 divisors (see below), whose sum is σ = 3586212. Its totient is φ = 910752.

The previous prime is 1821509. The next prime is 1821541. The reversal of 1821536 is 6351281.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 28430 + ... + 28493.

It is an arithmetic number, because the mean of its divisors is an integer number (298851).

2^1821536 is an apocalyptic number.

1821536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1821536 is a deficient number, since it is larger than the sum of its proper divisors (1764676).

1821536 is an equidigital number, since it uses as much as digits as its factorization.

1821536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56933 (or 56925 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1821536 is about 1349.6429157373. The cubic root of 1821536 is about 122.1272523346.

The spelling of 1821536 in words is "one million, eight hundred twenty-one thousand, five hundred thirty-six".