1220323 has 4 divisors (see below), whose sum is σ = 1314208. Its totient is φ = 1126440.

The previous prime is 1220309. The next prime is 1220327. The reversal of 1220323 is 3230221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1220323 - 2⁹ = 1219811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 93871 = 1220323 / (1 + 2 + 2 + 0 + 3 + 2 + 3).

It is a Duffinian number.

1220323 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1220327) 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, 46923 + ... + 46948.

It is an arithmetic number, because the mean of its divisors is an integer number (328552).

2^1220323 is an apocalyptic number.

1220323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220323 is a deficient number, since it is larger than the sum of its proper divisors (93885).

1220323 is an equidigital number, since it uses as much as digits as its factorization.

1220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93884.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1220323 is about 1104.6823072721. The cubic root of 1220323 is about 106.8624021036.

Adding to 1220323 its reverse (3230221), we get a palindrome (4450544).

The spelling of 1220323 in words is "one million, two hundred twenty thousand, three hundred twenty-three".