1806201 has 6 divisors (see below), whose sum is σ = 2608970. Its totient is φ = 1204128.

The previous prime is 1806193. The next prime is 1806209. The reversal of 1806201 is 1026081.

It is an interprime number because it is at equal distance from previous prime (1806193) and next prime (1806209).

It can be written as a sum of positive squares in only one way, i.e., 1498176 + 308025 = 1224^2 + 555^2 .

It is not a de Polignac number, because 1806201 - 2³ = 1806193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100336 + ... + 100353.

2^1806201 is an apocalyptic number.

It is an amenable number.

1806201 is a deficient number, since it is larger than the sum of its proper divisors (802769).

1806201 is a wasteful number, since it uses less digits than its factorization.

1806201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200695 (or 200692 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1806201 is about 1343.9497758473. The cubic root of 1806201 is about 121.7835677153.

The spelling of 1806201 in words is "one million, eight hundred six thousand, two hundred one".