123530205 has 16 divisors (see below), whose sum is σ = 198687744. Its totient is φ = 65536320.

The previous prime is 123530189. The next prime is 123530207. The reversal of 123530205 is 502035321.

It is not a de Polignac number, because 123530205 - 2⁴ = 123530189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123530207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18694 + ... + 24423.

It is an arithmetic number, because the mean of its divisors is an integer number (12417984).

Almost surely, 2^123530205 is an apocalyptic number.

123530205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123530205 is a deficient number, since it is larger than the sum of its proper divisors (75157539).

123530205 is a wasteful number, since it uses less digits than its factorization.

123530205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43316.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 123530205 is about 11114.4142895611. The cubic root of 123530205 is about 498.0325417035.

Adding to 123530205 its reverse (502035321), we get a palindrome (625565526).

The spelling of 123530205 in words is "one hundred twenty-three million, five hundred thirty thousand, two hundred five".