124820 has 18 divisors (see below), whose sum is σ = 265482. Its totient is φ = 49296.

The previous prime is 124819. The next prime is 124823. The reversal of 124820 is 28421.

It can be written as a sum of positive squares in only one way, i.e., 99856 + 24964 = 316^2 + 158^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 124820.

It is not an unprimeable number, because it can be changed into a prime (124823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1541 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (14749).

2¹²⁴⁸²⁰ is an apocalyptic number.

124820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124820 is an abundant number, since it is smaller than the sum of its proper divisors (140662).

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

124820 is an equidigital number, since it uses as much as digits as its factorization.

124820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 124820 is about 353.2987404450. The cubic root of 124820 is about 49.9759884708.

The spelling of 124820 in words is "one hundred twenty-four thousand, eight hundred twenty".