1220123 has 4 divisors (see below), whose sum is σ = 1284360.
Its totient is φ = 1155888.
The previous prime is 1220099. The next prime is 1220147. The reversal of 1220123 is 3210221.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (1220099) and next prime (1220147).
It is a cyclic number.
It is not a de Polignac number, because 1220123 - 214 = 1203739 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1220423) 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, 32090 + ... + 32127.
It is an arithmetic number, because the mean of its divisors is an integer number (321090).
21220123 is an apocalyptic number.
1220123 is a deficient number, since it is larger than the sum of its proper divisors (64237).
1220123 is an equidigital number, since it uses as much as digits as its factorization.
1220123 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 64236.
The product of its (nonzero) digits is 24, while the sum is 11.
The square root of 1220123 is about 1104.5917797992.
The cubic root of 1220123 is about 106.8565638548.
Adding to 1220123 its reverse (3210221), we get a palindrome (4430344).
The spelling of 1220123 in words is "one million, two hundred twenty thousand, one hundred twenty-three".