123415155 has 48 divisors (see below), whose sum is σ = 234355680. Its totient is φ = 59802624.

The previous prime is 123415153. The next prime is 123415163. The reversal of 123415155 is 551514321.

It is not a de Polignac number, because 123415155 - 2¹ = 123415153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123415151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19404 + ... + 24966.

It is an arithmetic number, because the mean of its divisors is an integer number (4882410).

Almost surely, 2^123415155 is an apocalyptic number.

123415155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123415155 is a deficient number, since it is larger than the sum of its proper divisors (110940525).

123415155 is a wasteful number, since it uses less digits than its factorization.

123415155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620 (or 5617 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 123415155 is about 11109.2373725652. The cubic root of 123415155 is about 497.8778792830.

Adding to 123415155 its reverse (551514321), we get a palindrome (674929476).

The spelling of 123415155 in words is "one hundred twenty-three million, four hundred fifteen thousand, one hundred fifty-five".