1223345 has 4 divisors (see below), whose sum is σ = 1468020. Its totient is φ = 978672.

The previous prime is 1223329. The next prime is 1223351. The reversal of 1223345 is 5433221.

It is a happy number.

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 659344 + 564001 = 812^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223345 - 2⁴ = 1223329 is a prime.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122330 + ... + 122339.

It is an arithmetic number, because the mean of its divisors is an integer number (367005).

2^1223345 is an apocalyptic number.

It is an amenable number.

1223345 is a deficient number, since it is larger than the sum of its proper divisors (244675).

1223345 is an equidigital number, since it uses as much as digits as its factorization.

1223345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244674.

The product of its digits is 720, while the sum is 20.

The square root of 1223345 is about 1106.0492755750. The cubic root of 1223345 is about 106.9505405094.

Adding to 1223345 its reverse (5433221), we get a palindrome (6656566).

The spelling of 1223345 in words is "one million, two hundred twenty-three thousand, three hundred forty-five".