124638 has 8 divisors (see below), whose sum is σ = 249288. Its totient is φ = 41544.

The previous prime is 124633. The next prime is 124643. The reversal of 124638 is 836421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (124633) and next prime (124643).

It is a sphenic number, since it is the product of 3 distinct primes.

124638 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 1 + 2³ + 6² + 4⁸ + 3¹⁰ + 8 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10381 + ... + 10392.

It is an arithmetic number, because the mean of its divisors is an integer number (31161).

2¹²⁴⁶³⁸ is an apocalyptic number.

124638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

124638 is a wasteful number, since it uses less digits than its factorization.

124638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778.

The product of its digits is 1152, while the sum is 24.

The square root of 124638 is about 353.0410740976. The cubic root of 124638 is about 49.9516866648.

The spelling of 124638 in words is "one hundred twenty-four thousand, six hundred thirty-eight".