1821360 has 40 divisors (see below), whose sum is σ = 5646960. Its totient is φ = 485632.

The previous prime is 1821353. The next prime is 1821371. The reversal of 1821360 is 631281.

It is a tau number, because it is divible by the number of its divisors (40).

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 in 7 ways as a sum of consecutive naturals, for example, 3555 + ... + 4034.

It is an arithmetic number, because the mean of its divisors is an integer number (141174).

2^1821360 is an apocalyptic number.

1821360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1821360 is an abundant number, since it is smaller than the sum of its proper divisors (3825600).

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

1821360 is a wasteful number, since it uses less digits than its factorization.

1821360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7599 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1821360 is about 1349.5777117306. The cubic root of 1821360 is about 122.1233188249.

The spelling of 1821360 in words is "one million, eight hundred twenty-one thousand, three hundred sixty".