124640136 has 24 divisors (see below), whose sum is σ = 337567230. Its totient is φ = 41546688.

The previous prime is 124640129. The next prime is 124640137. The reversal of 124640136 is 631046421.

124640136 is a `hidden beast` number, since 1 + 2 + 4 + 640 + 13 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110124036 + 14516100 = 10494^2 + 3810^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (124640137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 865485 + ... + 865628.

Almost surely, 2^124640136 is an apocalyptic number.

It is an amenable number.

124640136 is an abundant number, since it is smaller than the sum of its proper divisors (212927094).

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

124640136 is a wasteful number, since it uses less digits than its factorization.

124640136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731125 (or 1731118 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 124640136 is about 11164.2346804427. The cubic root of 124640136 is about 499.5197201436.

Adding to 124640136 its reverse (631046421), we get a palindrome (755686557).

The spelling of 124640136 in words is "one hundred twenty-four million, six hundred forty thousand, one hundred thirty-six".