124215140 has 48 divisors (see below), whose sum is σ = 307743744. Its totient is φ = 41212800.

The previous prime is 124215083. The next prime is 124215173. The reversal of 124215140 is 41512421.

It is a happy number.

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

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 15 ways as a sum of consecutive naturals, for example, 9971 + ... + 18650.

It is an arithmetic number, because the mean of its divisors is an integer number (6411328).

Almost surely, 2^124215140 is an apocalyptic number.

124215140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124215140 is an abundant number, since it is smaller than the sum of its proper divisors (183528604).

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

124215140 is a wasteful number, since it uses less digits than its factorization.

124215140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28668 (or 28666 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 124215140 is about 11145.1846104046. The cubic root of 124215140 is about 498.9513220869.

Adding to 124215140 its reverse (41512421), we get a palindrome (165727561).

The spelling of 124215140 in words is "one hundred twenty-four million, two hundred fifteen thousand, one hundred forty".