124521 has 4 divisors (see below), whose sum is σ = 166032. Its totient is φ = 83012.

The previous prime is 124513. The next prime is 124529. The reversal of 124521 is 125421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (124513) and next prime (124529).

It is a cyclic number.

It is not a de Polignac number, because 124521 - 2³ = 124513 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 124521.

It is not an unprimeable number, because it can be changed into a prime (124529) 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, 20751 + ... + 20756.

It is an arithmetic number, because the mean of its divisors is an integer number (41508).

2¹²⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

124521 is a deficient number, since it is larger than the sum of its proper divisors (41511).

124521 is an equidigital number, since it uses as much as digits as its factorization.

124521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41510.

The product of its digits is 80, while the sum is 15.

The square root of 124521 is about 352.8753320934. The cubic root of 124521 is about 49.9360515802.

Adding to 124521 its reverse (125421), we get a palindrome (249942).

Subtracting 124521 from its reverse (125421), we obtain a square (900 = 30²).

The spelling of 124521 in words is "one hundred twenty-four thousand, five hundred twenty-one".