123260138 has 8 divisors (see below), whose sum is σ = 187921380. Its totient is φ = 60619680.

The previous prime is 123260129. The next prime is 123260147. The reversal of 123260138 is 831062321.

It is an interprime number because it is at equal distance from previous prime (123260129) and next prime (123260147).

It can be written as a sum of positive squares in 2 ways, for example, as 82210489 + 41049649 = 9067^2 + 6407^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505043 + ... + 505286.

Almost surely, 2^123260138 is an apocalyptic number.

123260138 is a deficient number, since it is larger than the sum of its proper divisors (64661242).

123260138 is a wasteful number, since it uses less digits than its factorization.

123260138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010392.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 123260138 is about 11102.2582387549. The cubic root of 123260138 is about 497.6693368992.

The spelling of 123260138 in words is "one hundred twenty-three million, two hundred sixty thousand, one hundred thirty-eight".