123134145 has 32 divisors (see below), whose sum is σ = 215809920. Its totient is φ = 59673600.

The previous prime is 123134083. The next prime is 123134153. The reversal of 123134145 is 541431321.

It is a happy number.

It is not a de Polignac number, because 123134145 - 2¹⁰ = 123133121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 931 + ... + 15720.

It is an arithmetic number, because the mean of its divisors is an integer number (6744060).

Almost surely, 2^123134145 is an apocalyptic number.

123134145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123134145 is a deficient number, since it is larger than the sum of its proper divisors (92675775).

123134145 is a wasteful number, since it uses less digits than its factorization.

123134145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16705.

The product of its digits is 1440, while the sum is 24.

The square root of 123134145 is about 11096.5825820385. The cubic root of 123134145 is about 497.4997112866.

Adding to 123134145 its reverse (541431321), we get a palindrome (664565466).

The spelling of 123134145 in words is "one hundred twenty-three million, one hundred thirty-four thousand, one hundred forty-five".