1123502420 has 24 divisors (see below), whose sum is σ = 2363614344. Its totient is φ = 448589696.

The previous prime is 1123502417. The next prime is 1123502437. The reversal of 1123502420 is 242053211.

It can be written as a sum of positive squares in 4 ways, for example, as 16875664 + 1106626756 = 4108^2 + 33266^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1123502392 and 1123502401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39287 + ... + 61566.

It is an arithmetic number, because the mean of its divisors is an integer number (98483931).

Almost surely, 2^1123502420 is an apocalyptic number.

1123502420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123502420 is an abundant number, since it is smaller than the sum of its proper divisors (1240111924).

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

1123502420 is a wasteful number, since it uses less digits than its factorization.

1123502420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101419 (or 101417 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1123502420 is about 33518.6876234736. The cubic root of 1123502420 is about 1039.5802114954.

Adding to 1123502420 its reverse (242053211), we get a palindrome (1365555631).

The spelling of 1123502420 in words is "one billion, one hundred twenty-three million, five hundred two thousand, four hundred twenty".