124404140 has 36 divisors (see below), whose sum is σ = 303903936. Its totient is φ = 42652512.

The previous prime is 124404139. The next prime is 124404143. The reversal of 124404140 is 41404421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (124404143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62492 + ... + 64451.

It is an arithmetic number, because the mean of its divisors is an integer number (8441776).

Almost surely, 2^124404140 is an apocalyptic number.

124404140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124404140 is an abundant number, since it is smaller than the sum of its proper divisors (179499796).

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

124404140 is a wasteful number, since it uses less digits than its factorization.

124404140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126966 (or 126957 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 124404140 is about 11153.6603857209. The cubic root of 124404140 is about 499.2042542492.

Adding to 124404140 its reverse (41404421), we get a palindrome (165808561).

The spelling of 124404140 in words is "one hundred twenty-four million, four hundred four thousand, one hundred forty".