1806433 has 4 divisors (see below), whose sum is σ = 1826820. Its totient is φ = 1786048.

The previous prime is 1806421. The next prime is 1806461. The reversal of 1806433 is 3346081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3346081 = 251 ⋅13331.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 1216609 = 768^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1806433 - 2¹³ = 1798241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1806398 and 1806407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806533) 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, 10060 + ... + 10237.

It is an arithmetic number, because the mean of its divisors is an integer number (456705).

2^1806433 is an apocalyptic number.

It is an amenable number.

1806433 is a deficient number, since it is larger than the sum of its proper divisors (20387).

1806433 is an equidigital number, since it uses as much as digits as its factorization.

1806433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20386.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1806433 is about 1344.0360858251. The cubic root of 1806433 is about 121.7887817120.

The spelling of 1806433 in words is "one million, eight hundred six thousand, four hundred thirty-three".