124005545 has 4 divisors (see below), whose sum is σ = 148806660. Its totient is φ = 99204432.

The previous prime is 124005529. The next prime is 124005559. The reversal of 124005545 is 545500421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16613776 + 107391769 = 4076^2 + 10363^2 .

It is a cyclic number.

It is not a de Polignac number, because 124005545 - 2⁴ = 124005529 is a prime.

It is an unprimeable number.

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, 12400550 + ... + 12400559.

It is an arithmetic number, because the mean of its divisors is an integer number (37201665).

Almost surely, 2^124005545 is an apocalyptic number.

It is an amenable number.

124005545 is a deficient number, since it is larger than the sum of its proper divisors (24801115).

124005545 is an equidigital number, since it uses as much as digits as its factorization.

124005545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24801114.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 124005545 is about 11135.7777007266. Note that the first 4 decimals coincide. The cubic root of 124005545 is about 498.6705281423.

Adding to 124005545 its reverse (545500421), we get a palindrome (669505966).

The spelling of 124005545 in words is "one hundred twenty-four million, five thousand, five hundred forty-five".