1123200420 has 48 divisors (see below), whose sum is σ = 3218107200. Its totient is φ = 292553856.

The previous prime is 1123200413. The next prime is 1123200427. The reversal of 1123200420 is 240023211.

It is an interprime number because it is at equal distance from previous prime (1123200413) and next prime (1123200427).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1123200420.

It is not an unprimeable number, because it can be changed into a prime (1123200427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215095 + ... + 220254.

It is an arithmetic number, because the mean of its divisors is an integer number (67043900).

Almost surely, 2^1123200420 is an apocalyptic number.

1123200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123200420 is an abundant number, since it is smaller than the sum of its proper divisors (2094906780).

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

1123200420 is a wasteful number, since it uses less digits than its factorization.

1123200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435404 (or 435402 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1123200420 is about 33514.1823710500. The cubic root of 1123200420 is about 1039.4870559747.

Adding to 1123200420 its reverse (240023211), we get a palindrome (1363223631).

The spelling of 1123200420 in words is "one billion, one hundred twenty-three million, two hundred thousand, four hundred twenty".