1816253 has 2 divisors, whose sum is σ = 1816254. Its totient is φ = 1816252.

The previous prime is 1816247. The next prime is 1816261. The reversal of 1816253 is 3526181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964324 + 851929 = 982^2 + 923^2 .

It is an emirp because it is prime and its reverse (3526181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1816253 - 2⁴ = 1816237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908126 + 908127.

It is an arithmetic number, because the mean of its divisors is an integer number (908127).

2^1816253 is an apocalyptic number.

It is an amenable number.

1816253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816253 is an equidigital number, since it uses as much as digits as its factorization.

1816253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 1816253 is about 1347.6843102151. The cubic root of 1816253 is about 122.0090694682.

The spelling of 1816253 in words is "one million, eight hundred sixteen thousand, two hundred fifty-three".