123145423 has 12 divisors (see below), whose sum is σ = 128375040. Its totient is φ = 118117440.

The previous prime is 123145417. The next prime is 123145439. The reversal of 123145423 is 324541321.

It is not a de Polignac number, because 123145423 - 2⁵ = 123145391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123145493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121543 + ... + 122551.

It is an arithmetic number, because the mean of its divisors is an integer number (10697920).

Almost surely, 2^123145423 is an apocalyptic number.

123145423 is a deficient number, since it is larger than the sum of its proper divisors (5229617).

123145423 is a wasteful number, since it uses less digits than its factorization.

123145423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1167 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 123145423 is about 11097.0907448754. The cubic root of 123145423 is about 497.5148996825.

Adding to 123145423 its reverse (324541321), we get a palindrome (447686744).

The spelling of 123145423 in words is "one hundred twenty-three million, one hundred forty-five thousand, four hundred twenty-three".