124021818 has 12 divisors (see below), whose sum is σ = 268713978. Its totient is φ = 41340600.

The previous prime is 124021801. The next prime is 124021829. The reversal of 124021818 is 818120421.

It can be written as a sum of positive squares in only one way, i.e., 114639849 + 9381969 = 10707^2 + 3063^2 .

It is a super-2 number, since 2×124021818² = 30762822680050248, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124021791 and 124021800.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3445033 + ... + 3445068.

Almost surely, 2^124021818 is an apocalyptic number.

124021818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

124021818 is an abundant number, since it is smaller than the sum of its proper divisors (144692160).

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

124021818 is a wasteful number, since it uses less digits than its factorization.

124021818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6890109 (or 6890106 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 124021818 is about 11136.5083396907. The cubic root of 124021818 is about 498.6923403673.

The spelling of 124021818 in words is "one hundred twenty-four million, twenty-one thousand, eight hundred eighteen".