123256312 has 8 divisors (see below), whose sum is σ = 231105600. Its totient is φ = 61628152.

The previous prime is 123256277. The next prime is 123256321. The reversal of 123256312 is 213652321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7703512 + ... + 7703527.

It is an arithmetic number, because the mean of its divisors is an integer number (28888200).

Almost surely, 2^123256312 is an apocalyptic number.

It is an amenable number.

123256312 is a deficient number, since it is larger than the sum of its proper divisors (107849288).

123256312 is a wasteful number, since it uses less digits than its factorization.

123256312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15407045 (or 15407041 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 123256312 is about 11102.0859301304. The cubic root of 123256312 is about 497.6641876200.

The spelling of 123256312 in words is "one hundred twenty-three million, two hundred fifty-six thousand, three hundred twelve".