123868155 has 16 divisors (see below), whose sum is σ = 201929760. Its totient is φ = 64816128.

The previous prime is 123868141. The next prime is 123868177. The reversal of 123868155 is 551868321.

It is not a de Polignac number, because 123868155 - 2⁷ = 123868027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77110 + ... + 78699.

It is an arithmetic number, because the mean of its divisors is an integer number (12620610).

Almost surely, 2^123868155 is an apocalyptic number.

123868155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123868155 is a deficient number, since it is larger than the sum of its proper divisors (78061605).

123868155 is a wasteful number, since it uses less digits than its factorization.

123868155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155870.

The product of its digits is 57600, while the sum is 39.

The square root of 123868155 is about 11129.6071359235. The cubic root of 123868155 is about 498.4862953543.

The spelling of 123868155 in words is "one hundred twenty-three million, eight hundred sixty-eight thousand, one hundred fifty-five".