1229609 has 4 divisors (see below), whose sum is σ = 1232340. Its totient is φ = 1226880.

The previous prime is 1229597. The next prime is 1229617. The reversal of 1229609 is 9069221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9069221 = 7 ⋅1295603.

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 760384 = 685^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229609 - 2⁸ = 1229353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229689) 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, 512 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (308085).

2^1229609 is an apocalyptic number.

It is an amenable number.

1229609 is a deficient number, since it is larger than the sum of its proper divisors (2731).

1229609 is an equidigital number, since it uses as much as digits as its factorization.

1229609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1229609 is about 1108.8773602162. The cubic root of 1229609 is about 107.1327725535.

The spelling of 1229609 in words is "one million, two hundred twenty-nine thousand, six hundred nine".