1866301 has 2 divisors, whose sum is σ = 1866302. Its totient is φ = 1866300.

The previous prime is 1866283. The next prime is 1866307. The reversal of 1866301 is 1036681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1836025 + 30276 = 1355^2 + 174^2 .

It is an emirp because it is prime and its reverse (1036681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1866301 - 2⁵ = 1866269 is a prime.

1866301 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1866307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933150 + 933151.

It is an arithmetic number, because the mean of its divisors is an integer number (933151).

2^1866301 is an apocalyptic number.

It is an amenable number.

1866301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866301 is an equidigital number, since it uses as much as digits as its factorization.

1866301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1866301 is about 1366.1262752762. The cubic root of 1866301 is about 123.1196095624.

The spelling of 1866301 in words is "one million, eight hundred sixty-six thousand, three hundred one".