1223042000 has 80 divisors (see below), whose sum is σ = 2998184592. Its totient is φ = 482457600.

The previous prime is 1223041987. The next prime is 1223042003. The reversal of 1223042000 is 2403221.

It can be written as a sum of positive squares in 8 ways, for example, as 592630336 + 630411664 = 24344^2 + 25108^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223042003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141812 + ... + 150188.

Almost surely, 2^1223042000 is an apocalyptic number.

1223042000 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 1223042000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499092296).

1223042000 is an abundant number, since it is smaller than the sum of its proper divisors (1775142592).

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

1223042000 is an equidigital number, since it uses as much as digits as its factorization.

1223042000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8473 (or 8457 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1223042000 is about 34972.0173853325. The cubic root of 1223042000 is about 1069.4170988804.

Adding to 1223042000 its reverse (2403221), we get a palindrome (1225445221).

The spelling of 1223042000 in words is "one billion, two hundred twenty-three million, forty-two thousand".