1809041 has 8 divisors (see below), whose sum is σ = 2001384. Its totient is φ = 1624320.

The previous prime is 1809029. The next prime is 1809079. The reversal of 1809041 is 1409081.

It can be written as a sum of positive squares in 4 ways, for example, as 271441 + 1537600 = 521^2 + 1240^2 .

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 1809041 - 2⁶ = 1808977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1808998 and 1809016.

It is not an unprimeable number, because it can be changed into a prime (1809091) 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, 1400 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (250173).

2^1809041 is an apocalyptic number.

It is an amenable number.

1809041 is a deficient number, since it is larger than the sum of its proper divisors (192343).

1809041 is a wasteful number, since it uses less digits than its factorization.

1809041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1809041 is about 1345.0059479422. The cubic root of 1809041 is about 121.8473635342.

The spelling of 1809041 in words is "one million, eight hundred nine thousand, forty-one".