1123253420 has 24 divisors (see below), whose sum is σ = 2371872048. Its totient is φ = 446817600.

The previous prime is 1123253407. The next prime is 1123253429. The reversal of 1123253420 is 243523211.

It is not an unprimeable number, because it can be changed into a prime (1123253429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151526 + ... + 158765.

It is an arithmetic number, because the mean of its divisors is an integer number (98828002).

Almost surely, 2^1123253420 is an apocalyptic number.

1123253420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123253420 is an abundant number, since it is smaller than the sum of its proper divisors (1248618628).

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

1123253420 is a wasteful number, since it uses less digits than its factorization.

1123253420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310481 (or 310479 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1123253420 is about 33514.9730717481. The cubic root of 1123253420 is about 1039.5034056681.

Adding to 1123253420 its reverse (243523211), we get a palindrome (1366776631).

The spelling of 1123253420 in words is "one billion, one hundred twenty-three million, two hundred fifty-three thousand, four hundred twenty".