124221240 has 384 divisors, whose sum is σ = 503193600. Its totient is φ = 26127360.

The previous prime is 124221211. The next prime is 124221257. The reversal of 124221240 is 42122421.

124221240 is a `hidden beast` number, since 1 + 2 + 422 + 1 + 240 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 978057 + ... + 978183.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^124221240 is an apocalyptic number.

124221240 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 124221240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251596800).

124221240 is an abundant number, since it is smaller than the sum of its proper divisors (378972360).

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

124221240 is a wasteful number, since it uses less digits than its factorization.

124221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 180 counting only the distinct ones).

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

The square root of 124221240 is about 11145.4582678327. The cubic root of 124221240 is about 498.9594895112.

Adding to 124221240 its reverse (42122421), we get a palindrome (166343661).

The spelling of 124221240 in words is "one hundred twenty-four million, two hundred twenty-one thousand, two hundred forty".