1821032 has 8 divisors (see below), whose sum is σ = 3414450. Its totient is φ = 910512.

The previous prime is 1821019. The next prime is 1821037. The reversal of 1821032 is 2301281.

It can be written as a sum of positive squares in only one way, i.e., 948676 + 872356 = 974^2 + 934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1821032.

It is not an unprimeable number, because it can be changed into a prime (1821037) 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 as a sum of consecutive naturals, namely, 113807 + ... + 113822.

2^1821032 is an apocalyptic number.

It is an amenable number.

1821032 is a deficient number, since it is larger than the sum of its proper divisors (1593418).

1821032 is a wasteful number, since it uses less digits than its factorization.

1821032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227635 (or 227631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1821032 is about 1349.4561867656. The cubic root of 1821032 is about 122.1159875169.

Subtracting 1821032 from its reverse (2301281), we obtain a square (480249 = 693²).

The spelling of 1821032 in words is "one million, eight hundred twenty-one thousand, thirty-two".