123042512 has 10 divisors (see below), whose sum is σ = 238394898. Its totient is φ = 61521248.

The previous prime is 123042511. The next prime is 123042523. The reversal of 123042512 is 215240321.

It can be written as a sum of positive squares in only one way, i.e., 118897216 + 4145296 = 10904^2 + 2036^2 .

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845063 + ... + 3845094.

Almost surely, 2^123042512 is an apocalyptic number.

It is an amenable number.

123042512 is a deficient number, since it is larger than the sum of its proper divisors (115352386).

123042512 is an equidigital number, since it uses as much as digits as its factorization.

123042512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690165 (or 7690159 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123042512 is about 11092.4529298077. The cubic root of 123042512 is about 497.3762721869.

Adding to 123042512 its reverse (215240321), we get a palindrome (338282833).

The spelling of 123042512 in words is "one hundred twenty-three million, forty-two thousand, five hundred twelve".