123281105 has 8 divisors (see below), whose sum is σ = 149402664. Its totient is φ = 97648000.

The previous prime is 123281099. The next prime is 123281111. The reversal of 123281105 is 501182321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123281099) and next prime (123281111).

It can be written as a sum of positive squares in 4 ways, for example, as 54656449 + 68624656 = 7393^2 + 8284^2 .

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

It is not a de Polignac number, because 123281105 - 2⁴ = 123281089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121556 + ... + 122565.

It is an arithmetic number, because the mean of its divisors is an integer number (18675333).

Almost surely, 2^123281105 is an apocalyptic number.

It is an amenable number.

123281105 is a deficient number, since it is larger than the sum of its proper divisors (26121559).

123281105 is a wasteful number, since it uses less digits than its factorization.

123281105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244227.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 123281105 is about 11103.2024659555. The cubic root of 123281105 is about 497.6975537571.

The spelling of 123281105 in words is "one hundred twenty-three million, two hundred eighty-one thousand, one hundred five".