1806001 has 2 divisors, whose sum is σ = 1806002. Its totient is φ = 1806000.

The previous prime is 1805989. The next prime is 1806011. The reversal of 1806001 is 1006081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100401 + 705600 = 1049^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1806001 - 2⁷ = 1805873 is a prime.

It is a super-2 number, since 2×1806001² = 6523279224002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1806011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903000 + 903001.

It is an arithmetic number, because the mean of its divisors is an integer number (903001).

2^1806001 is an apocalyptic number.

It is an amenable number.

1806001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806001 is an equidigital number, since it uses as much as digits as its factorization.

1806001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1806001 is about 1343.8753662450. The cubic root of 1806001 is about 121.7790725322.

The spelling of 1806001 in words is "one million, eight hundred six thousand, one".