126640124 has 24 divisors (see below), whose sum is σ = 240868320. Its totient is φ = 57910464.

The previous prime is 126640121. The next prime is 126640141. The reversal of 126640124 is 421046621.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 126640093 and 126640102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126640121) 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, 5504 + ... + 16839.

It is an arithmetic number, because the mean of its divisors is an integer number (10036180).

Almost surely, 2^126640124 is an apocalyptic number.

It is an amenable number.

126640124 is a deficient number, since it is larger than the sum of its proper divisors (114228196).

126640124 is a wasteful number, since it uses less digits than its factorization.

126640124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22469 (or 22467 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 126640124 is about 11253.4494267313. The cubic root of 126640124 is about 502.1773366472.

Adding to 126640124 its reverse (421046621), we get a palindrome (547686745).

The spelling of 126640124 in words is "one hundred twenty-six million, six hundred forty thousand, one hundred twenty-four".