123043605 has 8 divisors (see below), whose sum is σ = 196869792. Its totient is φ = 65623248.

The previous prime is 123043577. The next prime is 123043621. The reversal of 123043605 is 506340321.

It is a happy number.

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

It is not a de Polignac number, because 123043605 - 2⁵ = 123043573 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4101439 + ... + 4101468.

It is an arithmetic number, because the mean of its divisors is an integer number (24608724).

Almost surely, 2^123043605 is an apocalyptic number.

123043605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123043605 is a deficient number, since it is larger than the sum of its proper divisors (73826187).

123043605 is an equidigital number, since it uses as much as digits as its factorization.

123043605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202915.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 123043605 is about 11092.5021974305. The cubic root of 123043605 is about 497.3777449317.

Adding to 123043605 its reverse (506340321), we get a palindrome (629383926).

The spelling of 123043605 in words is "one hundred twenty-three million, forty-three thousand, six hundred five".