1821359 has 8 divisors (see below), whose sum is σ = 1929840. Its totient is φ = 1714176.

The previous prime is 1821353. The next prime is 1821371. The reversal of 1821359 is 9531281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1821359 - 2¹⁶ = 1755823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4697 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (241230).

2^1821359 is an apocalyptic number.

1821359 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1821359 is a deficient number, since it is larger than the sum of its proper divisors (108481).

1821359 is a wasteful number, since it uses less digits than its factorization.

1821359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its digits is 2160, while the sum is 29.

The square root of 1821359 is about 1349.5773412443. The cubic root of 1821359 is about 122.1232964747.

The spelling of 1821359 in words is "one million, eight hundred twenty-one thousand, three hundred fifty-nine".