1243233420 has 96 divisors (see below), whose sum is σ = 4089657600. Its totient is φ = 278204160.

The previous prime is 1243233413. The next prime is 1243233449. The reversal of 1243233420 is 243323421.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 63870 + ... + 81029.

It is an arithmetic number, because the mean of its divisors is an integer number (42600600).

Almost surely, 2^1243233420 is an apocalyptic number.

1243233420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243233420 is an abundant number, since it is smaller than the sum of its proper divisors (2846424180).

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

1243233420 is a wasteful number, since it uses less digits than its factorization.

1243233420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144935 (or 144933 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243233420 is about 35259.5153114730. The cubic root of 1243233420 is about 1075.2700731207.

Adding to 1243233420 its reverse (243323421), we get a palindrome (1486556841).

Subtracting from 1243233420 its reverse (243323421), we obtain a palindrome (999909999).

The spelling of 1243233420 in words is "one billion, two hundred forty-three million, two hundred thirty-three thousand, four hundred twenty".