124325521 has 4 divisors (see below), whose sum is σ = 124456932. Its totient is φ = 124194112.

The previous prime is 124325519. The next prime is 124325527. The reversal of 124325521 is 125523421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125523421 = 61 ⋅2057761.

It can be written as a sum of positive squares in 2 ways, for example, as 84180625 + 40144896 = 9175^2 + 6336^2 .

It is a cyclic number.

It is not a de Polignac number, because 124325521 - 2¹ = 124325519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124325527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64276 + ... + 66181.

It is an arithmetic number, because the mean of its divisors is an integer number (31114233).

Almost surely, 2^124325521 is an apocalyptic number.

It is an amenable number.

124325521 is a deficient number, since it is larger than the sum of its proper divisors (131411).

124325521 is an equidigital number, since it uses as much as digits as its factorization.

124325521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131410.

The product of its digits is 2400, while the sum is 25.

The square root of 124325521 is about 11150.1354700291. The cubic root of 124325521 is about 499.0990723002.

Adding to 124325521 its reverse (125523421), we get a palindrome (249848942).

The spelling of 124325521 in words is "one hundred twenty-four million, three hundred twenty-five thousand, five hundred twenty-one".