1818449 has 4 divisors (see below), whose sum is σ = 1897536. Its totient is φ = 1739364.

The previous prime is 1818437. The next prime is 1818451. The reversal of 1818449 is 9448181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1818449 - 2¹⁶ = 1752913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39509 + ... + 39554.

It is an arithmetic number, because the mean of its divisors is an integer number (474384).

2^1818449 is an apocalyptic number.

It is an amenable number.

1818449 is a deficient number, since it is larger than the sum of its proper divisors (79087).

1818449 is an equidigital number, since it uses as much as digits as its factorization.

1818449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79086.

The product of its digits is 9216, while the sum is 35.

The square root of 1818449 is about 1348.4987949568. The cubic root of 1818449 is about 122.0582226800.

The spelling of 1818449 in words is "one million, eight hundred eighteen thousand, four hundred forty-nine".