512123423 has 8 divisors (see below), whose sum is σ = 588668448. Its totient is φ = 436424544.

The previous prime is 512123387. The next prime is 512123449. The reversal of 512123423 is 324321215.

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

It is a cyclic number.

It is not a de Polignac number, because 512123423 - 2¹² = 512119327 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 (512123483) 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, 210236 + ... + 212657.

It is an arithmetic number, because the mean of its divisors is an integer number (73583556).

Almost surely, 2^512123423 is an apocalyptic number.

512123423 is a deficient number, since it is larger than the sum of its proper divisors (76545025).

512123423 is a wasteful number, since it uses less digits than its factorization.

512123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423073.

The product of its digits is 1440, while the sum is 23.

The square root of 512123423 is about 22630.1441223868. The cubic root of 512123423 is about 800.0642776478.

Adding to 512123423 its reverse (324321215), we get a palindrome (836444638).

The spelling of 512123423 in words is "five hundred twelve million, one hundred twenty-three thousand, four hundred twenty-three".