123404012 has 24 divisors (see below), whose sum is σ = 227855040. Its totient is φ = 58317840.

The previous prime is 123404011. The next prime is 123404027. The reversal of 123404012 is 210404321.

It is a super-2 number, since 2×123404012² = 30457100355392288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123404011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35663 + ... + 38969.

It is an arithmetic number, because the mean of its divisors is an integer number (9493960).

Almost surely, 2^123404012 is an apocalyptic number.

It is an amenable number.

123404012 is a deficient number, since it is larger than the sum of its proper divisors (104451028).

123404012 is a wasteful number, since it uses less digits than its factorization.

123404012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123404012 is about 11108.7358416698. The cubic root of 123404012 is about 497.8628945750.

Adding to 123404012 its reverse (210404321), we get a palindrome (333808333).

The spelling of 123404012 in words is "one hundred twenty-three million, four hundred four thousand, twelve".