1818149 has 4 divisors (see below), whose sum is σ = 1832160. Its totient is φ = 1804140.

The previous prime is 1818109. The next prime is 1818151. The reversal of 1818149 is 9418181.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9418181 = 719 ⋅13099.

It is a cyclic number.

It is not a de Polignac number, because 1818149 - 2¹⁶ = 1752613 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818109) 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 in 3 ways as a sum of consecutive naturals, for example, 6809 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (458040).

2^1818149 is an apocalyptic number.

It is an amenable number.

1818149 is a deficient number, since it is larger than the sum of its proper divisors (14011).

1818149 is a wasteful number, since it uses less digits than its factorization.

1818149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14010.

The product of its digits is 2304, while the sum is 32.

The square root of 1818149 is about 1348.3875555641. The cubic root of 1818149 is about 122.0515100949.

Adding to 1818149 its sum of digits (32), we get a palindrome (1818181).

The spelling of 1818149 in words is "one million, eight hundred eighteen thousand, one hundred forty-nine".