124021 has 2 divisors, whose sum is σ = 124022. Its totient is φ = 124020.

The previous prime is 124001. The next prime is 124067. The reversal of 124021 is 120421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 1521 = 350^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 124021 - 2⁵ = 123989 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123989 and 124007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62010 + 62011.

It is an arithmetic number, because the mean of its divisors is an integer number (62011).

2¹²⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

124021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124021 is an equidigital number, since it uses as much as digits as its factorization.

124021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 124021 is about 352.1661539671. The cubic root of 124021 is about 49.8691243971.

Adding to 124021 its reverse (120421), we get a palindrome (244442).

Subtracting from 124021 its reverse (120421), we obtain a square (3600 = 60²).

It can be divided in two parts, 12402 and 1, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 124021 in words is "one hundred twenty-four thousand, twenty-one", and thus it is an iban number.