1223573 has 4 divisors (see below), whose sum is σ = 1317708. Its totient is φ = 1129440.

The previous prime is 1223569. The next prime is 1223587. The reversal of 1223573 is 3753221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3753221 = 97 ⋅38693.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 917764 = 553^2 + 958^2 .

It is not a de Polignac number, because 1223573 - 2² = 1223569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223533) 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 3 ways as a sum of consecutive naturals, for example, 47048 + ... + 47073.

It is an arithmetic number, because the mean of its divisors is an integer number (329427).

2^1223573 is an apocalyptic number.

1223573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1223573 is a deficient number, since it is larger than the sum of its proper divisors (94135).

1223573 is an equidigital number, since it uses as much as digits as its factorization.

1223573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94134.

The product of its digits is 1260, while the sum is 23.

The square root of 1223573 is about 1106.1523403221. The cubic root of 1223573 is about 106.9571843721.

Adding to 1223573 its reverse (3753221), we get a palindrome (4976794).

The spelling of 1223573 in words is "one million, two hundred twenty-three thousand, five hundred seventy-three".