123130605 has 32 divisors (see below), whose sum is σ = 219018240. Its totient is φ = 58659840.

The previous prime is 123130597. The next prime is 123130669. The reversal of 123130605 is 506031321.

It is not a de Polignac number, because 123130605 - 2³ = 123130597 is a prime.

It is a super-2 number, since 2×123130605² = 30322291775332050, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 4140 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (6844320).

Almost surely, 2^123130605 is an apocalyptic number.

123130605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123130605 is a deficient number, since it is larger than the sum of its proper divisors (95887635).

123130605 is a wasteful number, since it uses less digits than its factorization.

123130605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20421.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 123130605 is about 11096.4230723238. The cubic root of 123130605 is about 497.4949436790.

Adding to 123130605 its reverse (506031321), we get a palindrome (629161926).

The spelling of 123130605 in words is "one hundred twenty-three million, one hundred thirty thousand, six hundred five".