124640871 has 4 divisors (see below), whose sum is σ = 166187832. Its totient is φ = 83093912.

The previous prime is 124640833. The next prime is 124640897. The reversal of 124640871 is 178046421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124640871 - 2¹⁰ = 124639847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124640371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20773476 + ... + 20773481.

It is an arithmetic number, because the mean of its divisors is an integer number (41546958).

Almost surely, 2^124640871 is an apocalyptic number.

124640871 is a deficient number, since it is larger than the sum of its proper divisors (41546961).

124640871 is an equidigital number, since it uses as much as digits as its factorization.

124640871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41546960.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 124640871 is about 11164.2675980111. The cubic root of 124640871 is about 499.5207020270.

The spelling of 124640871 in words is "one hundred twenty-four million, six hundred forty thousand, eight hundred seventy-one".