1223000 has 32 divisors (see below), whose sum is σ = 2864160. Its totient is φ = 488800.

The previous prime is 1222993. The next prime is 1223003. The reversal of 1223000 is 3221.

It is a Harshad number since it is a multiple of its sum of digits (8).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (89505).

2^1223000 is an apocalyptic number.

1223000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432080).

1223000 is an abundant number, since it is smaller than the sum of its proper divisors (1641160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223000 is a wasteful number, since it uses less digits than its factorization.

1223000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1223000 is about 1105.8933040759. The cubic root of 1223000 is about 106.9404857264.

Adding to 1223000 its reverse (3221), we get a palindrome (1226221).

The spelling of 1223000 in words is "one million, two hundred twenty-three thousand".