124040540 has 48 divisors (see below), whose sum is σ = 290213280. Its totient is φ = 44217600.

The previous prime is 124040513. The next prime is 124040549. The reversal of 124040540 is 45040421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124040549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686 + ... + 15765.

It is an arithmetic number, because the mean of its divisors is an integer number (6046110).

Almost surely, 2^124040540 is an apocalyptic number.

124040540 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 124040540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145106640).

124040540 is an abundant number, since it is smaller than the sum of its proper divisors (166172740).

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

124040540 is a wasteful number, since it uses less digits than its factorization.

124040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16502 (or 16500 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 124040540 is about 11137.3488766403. The cubic root of 124040540 is about 498.7174328561.

Adding to 124040540 its reverse (45040421), we get a palindrome (169080961).

The spelling of 124040540 in words is "one hundred twenty-four million, forty thousand, five hundred forty".