1223409 has 16 divisors (see below), whose sum is σ = 1799424. Its totient is φ = 733200.

The previous prime is 1223381. The next prime is 1223419. The reversal of 1223409 is 9043221.

It is not a de Polignac number, because 1223409 - 2⁷ = 1223281 is a prime.

It is a super-3 number, since 3×1223409³ = 5493337320916220787, which contains 333 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1223419) 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 15 ways as a sum of consecutive naturals, for example, 4182 + ... + 4464.

It is an arithmetic number, because the mean of its divisors is an integer number (112464).

2^1223409 is an apocalyptic number.

It is an amenable number.

1223409 is a deficient number, since it is larger than the sum of its proper divisors (576015).

1223409 is a wasteful number, since it uses less digits than its factorization.

1223409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1223409 is about 1106.0782069998. The cubic root of 1223409 is about 106.9524055367.

The spelling of 1223409 in words is "one million, two hundred twenty-three thousand, four hundred nine".