124440140 has 24 divisors (see below), whose sum is σ = 285081552. Its totient is φ = 45250880.

The previous prime is 124440137. The next prime is 124440149. The reversal of 124440140 is 41044421.

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 (124440149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282599 + ... + 283038.

It is an arithmetic number, because the mean of its divisors is an integer number (11878398).

Almost surely, 2^124440140 is an apocalyptic number.

124440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124440140 is an abundant number, since it is smaller than the sum of its proper divisors (160641412).

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

124440140 is a wasteful number, since it uses less digits than its factorization.

124440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565657 (or 565655 counting only the distinct ones).

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

The square root of 124440140 is about 11155.2740889680. The cubic root of 124440140 is about 499.2524027538.

Adding to 124440140 its reverse (41044421), we get a palindrome (165484561).

The spelling of 124440140 in words is "one hundred twenty-four million, four hundred forty thousand, one hundred forty".