405123423 has 16 divisors (see below), whose sum is σ = 549494400. Its totient is φ = 265456800.

The previous prime is 405123371. The next prime is 405123427. The reversal of 405123423 is 324321504.

It is not a de Polignac number, because 405123423 - 2¹⁷ = 404992351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405123393 and 405123402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405123427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37308 + ... + 46926.

It is an arithmetic number, because the mean of its divisors is an integer number (34343400).

Almost surely, 2^405123423 is an apocalyptic number.

405123423 is a deficient number, since it is larger than the sum of its proper divisors (144370977).

405123423 is a wasteful number, since it uses less digits than its factorization.

405123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9862.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 405123423 is about 20127.6780329972. The cubic root of 405123423 is about 739.9387720220.

Adding to 405123423 its reverse (324321504), we get a palindrome (729444927).

The spelling of 405123423 in words is "four hundred five million, one hundred twenty-three thousand, four hundred twenty-three".