124720 has 20 divisors (see below), whose sum is σ = 290160. Its totient is φ = 49856.

The previous prime is 124717. The next prime is 124721. The reversal of 124720 is 27421.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 124694 and 124703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124721) 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, 700 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (14508).

2¹²⁴⁷²⁰ is an apocalyptic number.

124720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124720 is an abundant number, since it is smaller than the sum of its proper divisors (165440).

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

124720 is a wasteful number, since it uses less digits than its factorization.

124720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 124720 is about 353.1571887984. The cubic root of 124720 is about 49.9626387564.

The spelling of 124720 in words is "one hundred twenty-four thousand, seven hundred twenty", and thus it is an iban number.