1806901 has 2 divisors, whose sum is σ = 1806902. Its totient is φ = 1806900.

The previous prime is 1806899. The next prime is 1806941. The reversal of 1806901 is 1096081.

1806901 = 950² + 951².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904401 + 902500 = 951^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1806901 - 2¹ = 1806899 is a prime.

Together with 1806899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806941) 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 as a sum of consecutive naturals, namely, 903450 + 903451.

It is an arithmetic number, because the mean of its divisors is an integer number (903451).

2^1806901 is an apocalyptic number.

1806901 is the 951-st centered square number.

It is an amenable number.

1806901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806901 is an equidigital number, since it uses as much as digits as its factorization.

1806901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1806901 is about 1344.2101770185. The cubic root of 1806901 is about 121.7992982435.

The spelling of 1806901 in words is "one million, eight hundred six thousand, nine hundred one".