1223969 has 4 divisors (see below), whose sum is σ = 1241280. Its totient is φ = 1206660.

The previous prime is 1223953. The next prime is 1223977. The reversal of 1223969 is 9693221.

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 1223969 - 2⁴ = 1223953 is a prime.

It is a super-2 number, since 2×1223969² = 2996200225922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223939) 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, 8549 + ... + 8690.

It is an arithmetic number, because the mean of its divisors is an integer number (310320).

2^1223969 is an apocalyptic number.

It is an amenable number.

1223969 is a deficient number, since it is larger than the sum of its proper divisors (17311).

1223969 is an equidigital number, since it uses as much as digits as its factorization.

1223969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17310.

The product of its digits is 5832, while the sum is 32.

The square root of 1223969 is about 1106.3313246944. The cubic root of 1223969 is about 106.9687217512.

The spelling of 1223969 in words is "one million, two hundred twenty-three thousand, nine hundred sixty-nine".