1805401 has 8 divisors (see below), whose sum is σ = 1963080. Its totient is φ = 1650432.

The previous prime is 1805393. The next prime is 1805413. The reversal of 1805401 is 1045081.

It can be written as a sum of positive squares in 4 ways, for example, as 76176 + 1729225 = 276^2 + 1315^2 .

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 1805401 - 2³ = 1805393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1805491) 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 7 ways as a sum of consecutive naturals, for example, 855 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (245385).

2^1805401 is an apocalyptic number.

It is an amenable number.

1805401 is a deficient number, since it is larger than the sum of its proper divisors (157679).

1805401 is a wasteful number, since it uses less digits than its factorization.

1805401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1805401 is about 1343.6521127137. The cubic root of 1805401 is about 121.7655849914.

The spelling of 1805401 in words is "one million, eight hundred five thousand, four hundred one".