123428155 has 8 divisors (see below), whose sum is σ = 149095584. Its totient is φ = 98088000.

The previous prime is 123428141. The next prime is 123428159. The reversal of 123428155 is 551824321.

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

It is not a de Polignac number, because 123428155 - 2⁹ = 123427643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123428159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80986 + ... + 82495.

It is an arithmetic number, because the mean of its divisors is an integer number (18636948).

Almost surely, 2^123428155 is an apocalyptic number.

123428155 is a deficient number, since it is larger than the sum of its proper divisors (25667429).

123428155 is a wasteful number, since it uses less digits than its factorization.

123428155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163637.

The product of its digits is 9600, while the sum is 31.

The square root of 123428155 is about 11109.8224558271. The cubic root of 123428155 is about 497.8953600783.

The spelling of 123428155 in words is "one hundred twenty-three million, four hundred twenty-eight thousand, one hundred fifty-five".