1223389 has 4 divisors (see below), whose sum is σ = 1226524. Its totient is φ = 1220256.

The previous prime is 1223381. The next prime is 1223419. The reversal of 1223389 is 9833221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 466489 + 756900 = 683^2 + 870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223389 - 2³ = 1223381 is a prime.

It is an Ulam number.

It is a Duffinian number.

1223389 is a lucky number.

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223381) 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, 882 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (306631).

2^1223389 is an apocalyptic number.

It is an amenable number.

1223389 is a deficient number, since it is larger than the sum of its proper divisors (3135).

1223389 is an equidigital number, since it uses as much as digits as its factorization.

1223389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134.

The product of its digits is 2592, while the sum is 28.

The square root of 1223389 is about 1106.0691660109. The cubic root of 1223389 is about 106.9518227226.

The spelling of 1223389 in words is "one million, two hundred twenty-three thousand, three hundred eighty-nine".