1805041 has 4 divisors (see below), whose sum is σ = 2062912. Its totient is φ = 1547172.

The previous prime is 1805039. The next prime is 1805053. The reversal of 1805041 is 1405081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1405081 = 239 ⋅5879.

It is a cyclic number.

It is not a de Polignac number, because 1805041 - 2¹ = 1805039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1805081) 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, 128925 + ... + 128938.

It is an arithmetic number, because the mean of its divisors is an integer number (515728).

2^1805041 is an apocalyptic number.

It is an amenable number.

1805041 is a deficient number, since it is larger than the sum of its proper divisors (257871).

1805041 is an equidigital number, since it uses as much as digits as its factorization.

1805041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257870.

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

The square root of 1805041 is about 1343.5181427878. The cubic root of 1805041 is about 121.7574910325.

The spelling of 1805041 in words is "one million, eight hundred five thousand, forty-one".