1123420452 has 216 divisors, whose sum is σ = 3539557728. Its totient is φ = 274176000.

The previous prime is 1123420447. The next prime is 1123420453. The reversal of 1123420452 is 2540243211.

It is not an unprimeable number, because it can be changed into a prime (1123420453) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1868952 + ... + 1869552.

Almost surely, 2^1123420452 is an apocalyptic number.

1123420452 is a gapful number since it is divisible by the number (12) 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 1123420452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769778864).

1123420452 is an abundant number, since it is smaller than the sum of its proper divisors (2416137276).

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

1123420452 is a wasteful number, since it uses less digits than its factorization.

1123420452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1123420452 is about 33517.4648802680. The cubic root of 1123420452 is about 1039.5549291338.

Adding to 1123420452 its reverse (2540243211), we get a palindrome (3663663663).

The spelling of 1123420452 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, four hundred fifty-two".