405042523123 has 8 divisors (see below), whose sum is σ = 473670990848. Its totient is φ = 339105367944.

The previous prime is 405042523043. The next prime is 405042523217. The reversal of 405042523123 is 321325240504.

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

It is a de Polignac number, because none of the positive numbers 2^k-405042523123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405042524123) 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, 672827811 + ... + 672828412.

It is an arithmetic number, because the mean of its divisors is an integer number (59208873856).

Almost surely, 2^405042523123 is an apocalyptic number.

405042523123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

405042523123 is a deficient number, since it is larger than the sum of its proper divisors (68628467725).

405042523123 is a wasteful number, since it uses less digits than its factorization.

405042523123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345656273.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 405042523123 its reverse (321325240504), we get a palindrome (726367763627).

The spelling of 405042523123 in words is "four hundred five billion, forty-two million, five hundred twenty-three thousand, one hundred twenty-three".