124155220 has 72 divisors (see below), whose sum is σ = 305665920. Its totient is φ = 42235200.

The previous prime is 124155209. The next prime is 124155223. The reversal of 124155220 is 22551421.

It is a junction number, because it is equal to n+sod(n) for n = 124155191 and 124155200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124155223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147561 + ... + 148399.

It is an arithmetic number, because the mean of its divisors is an integer number (4245360).

Almost surely, 2^124155220 is an apocalyptic number.

124155220 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 124155220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152832960).

124155220 is an abundant number, since it is smaller than the sum of its proper divisors (181510700).

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

124155220 is a wasteful number, since it uses less digits than its factorization.

124155220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 124155220 is about 11142.4961296830. The cubic root of 124155220 is about 498.8710796628.

The spelling of 124155220 in words is "one hundred twenty-four million, one hundred fifty-five thousand, two hundred twenty".