123138654 has 16 divisors (see below), whose sum is σ = 246386448. Its totient is φ = 41028032.

The previous prime is 123138641. The next prime is 123138661. The reversal of 123138654 is 456831321.

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, 22474 + ... + 27410.

It is an arithmetic number, because the mean of its divisors is an integer number (15399153).

Almost surely, 2^123138654 is an apocalyptic number.

123138654 is an abundant number, since it is smaller than the sum of its proper divisors (123247794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123138654 is a wasteful number, since it uses less digits than its factorization.

123138654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9099.

The product of its digits is 17280, while the sum is 33.

The square root of 123138654 is about 11096.7857508379. The cubic root of 123138654 is about 497.5057837934.

Adding to 123138654 its reverse (456831321), we get a palindrome (579969975).

The spelling of 123138654 in words is "one hundred twenty-three million, one hundred thirty-eight thousand, six hundred fifty-four".