123253220 has 24 divisors (see below), whose sum is σ = 259244664. Its totient is φ = 49222656.

The previous prime is 123253211. The next prime is 123253243. The reversal of 123253220 is 22352321.

It can be written as a sum of positive squares in 4 ways, for example, as 87616 + 123165604 = 296^2 + 11098^2 .

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 = 123253192 and 123253201.

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, 8882 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (10801861).

Almost surely, 2^123253220 is an apocalyptic number.

123253220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123253220 is an abundant number, since it is smaller than the sum of its proper divisors (135991444).

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

123253220 is a wasteful number, since it uses less digits than its factorization.

123253220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9839 (or 9837 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 123253220 is about 11101.9466761465. The cubic root of 123253220 is about 497.6600261279.

The spelling of 123253220 in words is "one hundred twenty-three million, two hundred fifty-three thousand, two hundred twenty".