1806473 has 6 divisors (see below), whose sum is σ = 1851354. Its totient is φ = 1762656.

The previous prime is 1806461. The next prime is 1806479. The reversal of 1806473 is 3746081.

It can be written as a sum of positive squares in only one way, i.e., 1776889 + 29584 = 1333^2 + 172^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1806473 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1361 + ... + 2337.

It is an arithmetic number, because the mean of its divisors is an integer number (308559).

2^1806473 is an apocalyptic number.

It is an amenable number.

1806473 is a deficient number, since it is larger than the sum of its proper divisors (44881).

1806473 is an frugal number, since it uses more digits than its factorization.

1806473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1806473 is about 1344.0509662955. The cubic root of 1806473 is about 121.7896806318.

The spelling of 1806473 in words is "one million, eight hundred six thousand, four hundred seventy-three".