123090512 has 40 divisors (see below), whose sum is σ = 252736800. Its totient is φ = 57912192.

The previous prime is 123090479. The next prime is 123090521. The reversal of 123090512 is 215090321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46439 + ... + 49017.

It is an arithmetic number, because the mean of its divisors is an integer number (6318420).

Almost surely, 2^123090512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123090512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126368400).

123090512 is an abundant number, since it is smaller than the sum of its proper divisors (129646288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123090512 is a wasteful number, since it uses less digits than its factorization.

123090512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 123090512 is about 11094.6163520872. The cubic root of 123090512 is about 497.4409407768.

The spelling of 123090512 in words is "one hundred twenty-three million, ninety thousand, five hundred twelve".