123243530 has 8 divisors (see below), whose sum is σ = 221838372. Its totient is φ = 49297408.

The previous prime is 123243529. The next prime is 123243539. The reversal of 123243530 is 35342321.

It can be written as a sum of positive squares in 2 ways, for example, as 107474689 + 15768841 = 10367^2 + 3971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 123243496 and 123243505.

It is not an unprimeable number, because it can be changed into a prime (123243539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6162167 + ... + 6162186.

Almost surely, 2^123243530 is an apocalyptic number.

123243530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123243530 is a deficient number, since it is larger than the sum of its proper divisors (98594842).

123243530 is a wasteful number, since it uses less digits than its factorization.

123243530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12324360.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 123243530 is about 11101.5102576181. The cubic root of 123243530 is about 497.6469840020.

Adding to 123243530 its reverse (35342321), we get a palindrome (158585851).

The spelling of 123243530 in words is "one hundred twenty-three million, two hundred forty-three thousand, five hundred thirty".