1682409 has 4 divisors (see below), whose sum is σ = 2243216. Its totient is φ = 1121604.

The previous prime is 1682407. The next prime is 1682413. The reversal of 1682409 is 9042861.

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 not a de Polignac number, because 1682409 - 2¹ = 1682407 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1682407) 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, 280399 + ... + 280404.

It is an arithmetic number, because the mean of its divisors is an integer number (560804).

2^1682409 is an apocalyptic number.

It is an amenable number.

1682409 is a deficient number, since it is larger than the sum of its proper divisors (560807).

1682409 is an equidigital number, since it uses as much as digits as its factorization.

1682409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560806.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1682409 is about 1297.0770987108. The cubic root of 1682409 is about 118.9352329812.

The spelling of 1682409 in words is "one million, six hundred eighty-two thousand, four hundred nine".