123541312 has 56 divisors (see below), whose sum is σ = 261152640. Its totient is φ = 57784320.

The previous prime is 123541309. The next prime is 123541351. The reversal of 123541312 is 213145321.

It is a happy number.

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, 294639 + ... + 295057.

It is an arithmetic number, because the mean of its divisors is an integer number (4663440).

Almost surely, 2^123541312 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 123541312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130576320).

123541312 is an abundant number, since it is smaller than the sum of its proper divisors (137611328).

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

123541312 is a wasteful number, since it uses less digits than its factorization.

123541312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 709 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 123541312 is about 11114.9139447861. The cubic root of 123541312 is about 498.0474678280.

Adding to 123541312 its reverse (213145321), we get a palindrome (336686633).

The spelling of 123541312 in words is "one hundred twenty-three million, five hundred forty-one thousand, three hundred twelve".