1819801 has 9 divisors (see below), whose sum is σ = 1948053. Its totient is φ = 1699740.

The previous prime is 1819781. The next prime is 1819819. The reversal of 1819801 is 1089181.

The square root of 1819801 is 1349.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1819801 - 2¹⁵ = 1787033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1819801.

It is not an unprimeable number, because it can be changed into a prime (1819841) 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 8 ways as a sum of consecutive naturals, for example, 25596 + ... + 25666.

2^1819801 is an apocalyptic number.

1819801 is the 1349-th square number.

1819801 is the 675-th centered octagonal number.

It is an amenable number.

1819801 is a deficient number, since it is larger than the sum of its proper divisors (128252).

1819801 is an frugal number, since it uses more digits than its factorization.

1819801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 28.

The cubic root of 1819801 is about 122.0884649059.

Multiplying 1819801 by its product of nonzero digits (576), we get a square (1048205376 = 32376²).

The spelling of 1819801 in words is "one million, eight hundred nineteen thousand, eight hundred one".