124000020 has 36 divisors (see below), whose sum is σ = 376133940. Its totient is φ = 33066624.

The previous prime is 124000001. The next prime is 124000021. The reversal of 124000020 is 20000421.

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 108743184 = 3906^2 + 10428^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 123999966 and 124000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124000021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344265 + ... + 344624.

It is an arithmetic number, because the mean of its divisors is an integer number (10448165).

Almost surely, 2^124000020 is an apocalyptic number.

124000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124000020 is an abundant number, since it is smaller than the sum of its proper divisors (252133920).

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

124000020 is a wasteful number, since it uses less digits than its factorization.

124000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688904 (or 688899 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 124000020 is about 11135.5296236865. The cubic root of 124000020 is about 498.6631220337.

Adding to 124000020 its reverse (20000421), we get a palindrome (144000441).

The spelling of 124000020 in words is "one hundred twenty-four million, twenty", and thus it is an aban number.