1818457 has 2 divisors, whose sum is σ = 1818458. Its totient is φ = 1818456.

The previous prime is 1818451. The next prime is 1818469. The reversal of 1818457 is 7548181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1713481 + 104976 = 1309^2 + 324^2 .

It is an emirp because it is prime and its reverse (7548181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1818457 - 2¹⁵ = 1785689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1818451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909228 + 909229.

It is an arithmetic number, because the mean of its divisors is an integer number (909229).

2^1818457 is an apocalyptic number.

It is an amenable number.

1818457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818457 is an equidigital number, since it uses as much as digits as its factorization.

1818457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 34.

The square root of 1818457 is about 1348.5017612150. The cubic root of 1818457 is about 122.0584016721.

The spelling of 1818457 in words is "one million, eight hundred eighteen thousand, four hundred fifty-seven".