1219009 has 4 divisors (see below), whose sum is σ = 1329840. Its totient is φ = 1108180.

The previous prime is 1219003. The next prime is 1219061. The reversal of 1219009 is 9009121.

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 1219009 - 2¹¹ = 1216961 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219003) 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, 55399 + ... + 55420.

It is an arithmetic number, because the mean of its divisors is an integer number (332460).

2^1219009 is an apocalyptic number.

It is an amenable number.

1219009 is a deficient number, since it is larger than the sum of its proper divisors (110831).

1219009 is a wasteful number, since it uses less digits than its factorization.

1219009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110830.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1219009 is about 1104.0874059602. The cubic root of 1219009 is about 106.8240331294.

The spelling of 1219009 in words is "one million, two hundred nineteen thousand, nine".