123043220 has 12 divisors (see below), whose sum is σ = 258390804. Its totient is φ = 49217280.

The previous prime is 123043187. The next prime is 123043223. The reversal of 123043220 is 22340321.

It can be written as a sum of positive squares in 2 ways, for example, as 56490256 + 66552964 = 7516^2 + 8158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123043223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3076061 + ... + 3076100.

It is an arithmetic number, because the mean of its divisors is an integer number (21532567).

Almost surely, 2^123043220 is an apocalyptic number.

123043220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123043220 is an abundant number, since it is smaller than the sum of its proper divisors (135347584).

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

123043220 is a wasteful number, since it uses less digits than its factorization.

123043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152170 (or 6152168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123043220 is about 11092.4848433523. The cubic root of 123043220 is about 497.3772261708.

Adding to 123043220 its reverse (22340321), we get a palindrome (145383541).

The spelling of 123043220 in words is "one hundred twenty-three million, forty-three thousand, two hundred twenty".