1243105612 has 48 divisors (see below), whose sum is σ = 2531354112. Its totient is φ = 523152000.

The previous prime is 1243105579. The next prime is 1243105621. The reversal of 1243105612 is 2165013421.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511833 + ... + 514255.

It is an arithmetic number, because the mean of its divisors is an integer number (52736544).

Almost surely, 2^1243105612 is an apocalyptic number.

It is an amenable number.

1243105612 is an abundant number, since it is smaller than the sum of its proper divisors (1288248500).

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

1243105612 is a wasteful number, since it uses less digits than its factorization.

1243105612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1243105612 is about 35257.7028746911. The cubic root of 1243105612 is about 1075.2332248977.

The spelling of 1243105612 in words is "one billion, two hundred forty-three million, one hundred five thousand, six hundred twelve".