1223020 has 12 divisors (see below), whose sum is σ = 2568384. Its totient is φ = 489200.

The previous prime is 1223003. The next prime is 1223021. The reversal of 1223020 is 203221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1222988 and 1223006.

It is not an unprimeable number, because it can be changed into a prime (1223021) 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, 30556 + ... + 30595.

It is an arithmetic number, because the mean of its divisors is an integer number (214032).

2^1223020 is an apocalyptic number.

1223020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223020 is an abundant number, since it is smaller than the sum of its proper divisors (1345364).

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

1223020 is a wasteful number, since it uses less digits than its factorization.

1223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61160 (or 61158 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1223020 is about 1105.9023465026. The cubic root of 1223020 is about 106.9410686640.

Adding to 1223020 its reverse (203221), we get a palindrome (1426241).

It can be divided in two parts, 12 and 23020, that added together give a palindrome (23032).

The spelling of 1223020 in words is "one million, two hundred twenty-three thousand, twenty".