123522020 has 24 divisors (see below), whose sum is σ = 268342200. Its totient is φ = 47704832.

The previous prime is 123522019. The next prime is 123522023. The reversal of 123522020 is 20225321.

It can be written as a sum of positive squares in 4 ways, for example, as 44809636 + 78712384 = 6694^2 + 8872^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123522020.

It is not an unprimeable number, because it can be changed into a prime (123522023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105905 + ... + 107064.

It is an arithmetic number, because the mean of its divisors is an integer number (11180925).

Almost surely, 2^123522020 is an apocalyptic number.

123522020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123522020 is an abundant number, since it is smaller than the sum of its proper divisors (144820180).

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

123522020 is a wasteful number, since it uses less digits than its factorization.

123522020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213007 (or 213005 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 123522020 is about 11114.0460679268. The cubic root of 123522020 is about 498.0215417315.

Adding to 123522020 its reverse (20225321), we get a palindrome (143747341).

The spelling of 123522020 in words is "one hundred twenty-three million, five hundred twenty-two thousand, twenty".