1204009 has 4 divisors (see below), whose sum is σ = 1242880. Its totient is φ = 1165140.

The previous prime is 1204003. The next prime is 1204019. The reversal of 1204009 is 9004021.

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 1204009 - 2¹¹ = 1201961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203983 and 1204001.

It is not an unprimeable number, because it can be changed into a prime (1204003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19389 + ... + 19450.

It is an arithmetic number, because the mean of its divisors is an integer number (310720).

2^1204009 is an apocalyptic number.

It is an amenable number.

1204009 is a deficient number, since it is larger than the sum of its proper divisors (38871).

1204009 is an equidigital number, since it uses as much as digits as its factorization.

1204009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38870.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1204009 is about 1097.2734390297. The cubic root of 1204009 is about 106.3840642179.

It can be divided in two parts, 120400 and 9, that added together give a square (120409 = 347²).

The spelling of 1204009 in words is "one million, two hundred four thousand, nine".