123405412 has 24 divisors (see below), whose sum is σ = 236965176. Its totient is φ = 55880448.

The previous prime is 123405407. The next prime is 123405413. The reversal of 123405412 is 214504321.

It can be written as a sum of positive squares in 4 ways, for example, as 42693156 + 80712256 = 6534^2 + 8984^2 .

It is not an unprimeable number, because it can be changed into a prime (123405413) 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, 19633 + ... + 25144.

It is an arithmetic number, because the mean of its divisors is an integer number (9873549).

Almost surely, 2^123405412 is an apocalyptic number.

It is an amenable number.

123405412 is a deficient number, since it is larger than the sum of its proper divisors (113559764).

123405412 is a wasteful number, since it uses less digits than its factorization.

123405412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44847 (or 44845 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 123405412 is about 11108.7988549618. The cubic root of 123405412 is about 497.8647772945.

Adding to 123405412 its reverse (214504321), we get a palindrome (337909733).

The spelling of 123405412 in words is "one hundred twenty-three million, four hundred five thousand, four hundred twelve".