123312005 has 8 divisors (see below), whose sum is σ = 148077600. Its totient is φ = 98580816.

The previous prime is 123312001. The next prime is 123312023. The reversal of 123312005 is 500213321.

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

It is a cyclic number.

It is not a de Polignac number, because 123312005 - 2² = 123312001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 15704.

It is an arithmetic number, because the mean of its divisors is an integer number (18509700).

Almost surely, 2^123312005 is an apocalyptic number.

It is an amenable number.

123312005 is a deficient number, since it is larger than the sum of its proper divisors (24765595).

123312005 is a wasteful number, since it uses less digits than its factorization.

123312005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17203.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 123312005 is about 11104.5938692057. The cubic root of 123312005 is about 497.7391323637.

Adding to 123312005 its reverse (500213321), we get a palindrome (623525326).

The spelling of 123312005 in words is "one hundred twenty-three million, three hundred twelve thousand, five".