• 124 can be written using four 4's:

124 has 6 divisors (see below), whose sum is σ = 224. Its totient is φ = 60.

The previous prime is 113. The next prime is 127. The reversal of 124 is 421.

124 is nontrivially palindromic in base 5.

It is a Cunningham number, because it is equal to 5^{3}-1.

It is a nude number because it is divisible by every one of its digits.

It is an iccanobiF number.

It is one of the 548 Lynch-Bell numbers.

124 is a nontrivial repdigit in base 5.

It is a plaindrome in base 5, base 7, base 9, base 10, base 14 and base 16.

It is a nialpdrome in base 2, base 5, base 12, base 13 and base 15.

It is a zygodrome in base 2 and base 5.

It is a congruent number.

124 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12 + ... + 19.

It is an amenable number.

124 is a deficient number, since it is larger than the sum of its proper divisors (100).

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

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

The sum of its prime factors is 35 (or 33 counting only the distinct ones).

The product of its digits is 8, while the sum is 7.

The square root of 124 is about 11.1355287257. The cubic root of 124 is about 4.9866309522.

Adding to 124 its reverse (421), we get a palindrome (545).

It can be divided in two parts, 12 and 4, that added together give a 4-th power (16 = 2^{4}).

The spelling of 124 in words is "one hundred twenty-four", and thus it is an aban number and an iban number.

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