1805000001 has 8 divisors (see below), whose sum is σ = 2750476224. Its totient is φ = 1031428560.

The previous prime is 1804999969. The next prime is 1805000051. The reversal of 1805000001 is 1000005081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1805000001 - 2⁵ = 1804999969 is a prime.

It is a super-2 number, since 2×1805000001² = 6516050007220000002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1805000051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42976170 + ... + 42976211.

It is an arithmetic number, because the mean of its divisors is an integer number (343809528).

Almost surely, 2^1805000001 is an apocalyptic number.

It is an amenable number.

1805000001 is a deficient number, since it is larger than the sum of its proper divisors (945476223).

1805000001 is an equidigital number, since it uses as much as digits as its factorization.

1805000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85952391.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1805000001 is about 42485.2915842648. The cubic root of 1805000001 is about 1217.5656917473.

Adding to 1805000001 its reverse (1000005081), we get a palindrome (2805005082).

The spelling of 1805000001 in words is "one billion, eight hundred five million, one", and thus it is an aban number.