124421220 has 288 divisors, whose sum is σ = 483065856. Its totient is φ = 25171200.

The previous prime is 124421207. The next prime is 124421239. The reversal of 124421220 is 22124421.

124421220 is a `hidden beast` number, since 1 + 2 + 442 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 124421193 and 124421202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 651325 + ... + 651515.

It is an arithmetic number, because the mean of its divisors is an integer number (1677312).

Almost surely, 2^124421220 is an apocalyptic number.

124421220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124421220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241532928).

124421220 is an abundant number, since it is smaller than the sum of its proper divisors (358644636).

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

124421220 is a wasteful number, since it uses less digits than its factorization.

124421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 124421220 is about 11154.4260273669. The cubic root of 124421220 is about 499.2270991976.

Adding to 124421220 its reverse (22124421), we get a palindrome (146545641).

The spelling of 124421220 in words is "one hundred twenty-four million, four hundred twenty-one thousand, two hundred twenty".