124521020 has 24 divisors (see below), whose sum is σ = 281609664. Its totient is φ = 45976896.

The previous prime is 124521013. The next prime is 124521029. The reversal of 124521020 is 20125421.

It is a self number, because there is not a number n which added to its sum of digits gives 124521020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124521029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239204 + ... + 239723.

It is an arithmetic number, because the mean of its divisors is an integer number (11733736).

Almost surely, 2^124521020 is an apocalyptic number.

124521020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124521020 is an abundant number, since it is smaller than the sum of its proper divisors (157088644).

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

124521020 is a wasteful number, since it uses less digits than its factorization.

124521020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478949 (or 478947 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 124521020 is about 11158.8986911792. The cubic root of 124521020 is about 499.3605425369.

Adding to 124521020 its reverse (20125421), we get a palindrome (144646441).

The spelling of 124521020 in words is "one hundred twenty-four million, five hundred twenty-one thousand, twenty".