1223005 has 16 divisors (see below), whose sum is σ = 1701504. Its totient is φ = 826560.

The previous prime is 1223003. The next prime is 1223021. The reversal of 1223005 is 5003221.

1223005 = 78² + 79² + ... + 160².

It is not a de Polignac number, because 1223005 - 2¹ = 1223003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223003) 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 15 ways as a sum of consecutive naturals, for example, 2695 + ... + 3115.

It is an arithmetic number, because the mean of its divisors is an integer number (106344).

2^1223005 is an apocalyptic number.

It is an amenable number.

1223005 is a deficient number, since it is larger than the sum of its proper divisors (478499).

1223005 is an equidigital number, since it uses as much as digits as its factorization.

1223005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 1223005 is about 1105.8955646895. The cubic root of 1223005 is about 106.9406314614.

Adding to 1223005 its reverse (5003221), we get a palindrome (6226226).

The spelling of 1223005 in words is "one million, two hundred twenty-three thousand, five".