1801573 has 4 divisors (see below), whose sum is σ = 1819168. Its totient is φ = 1783980.

The previous prime is 1801549. The next prime is 1801577. The reversal of 1801573 is 3751081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1801573 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 (1801577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8643 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (454792).

2^1801573 is an apocalyptic number.

It is an amenable number.

1801573 is a deficient number, since it is larger than the sum of its proper divisors (17595).

1801573 is a wasteful number, since it uses less digits than its factorization.

1801573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17594.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1801573 is about 1342.2268809706. The cubic root of 1801573 is about 121.6794640528.

The spelling of 1801573 in words is "one million, eight hundred one thousand, five hundred seventy-three".