1814409 has 9 divisors (see below), whose sum is σ = 2626663. Its totient is φ = 1206912.

The previous prime is 1814383. The next prime is 1814413. The reversal of 1814409 is 9044181.

The square root of 1814409 is 1347.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 705600 = 1053^2 + 840^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1814409 - 2⁵ = 1814377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1814429) 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 8 ways as a sum of consecutive naturals, for example, 3817 + ... + 4265.

2^1814409 is an apocalyptic number.

1814409 is the 1347-th square number.

1814409 is the 674-th centered octagonal number.

It is an amenable number.

1814409 is a deficient number, since it is larger than the sum of its proper divisors (812254).

1814409 is an frugal number, since it uses more digits than its factorization.

1814409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The cubic root of 1814409 is about 121.9677644834.

The spelling of 1814409 in words is "one million, eight hundred fourteen thousand, four hundred nine".