2129912 has 8 divisors (see below), whose sum is σ = 3993600. Its totient is φ = 1064952.

The previous prime is 2129903. The next prime is 2129951. The reversal of 2129912 is 2199212.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133112 + ... + 133127.

It is an arithmetic number, because the mean of its divisors is an integer number (499200).

2^2129912 is an apocalyptic number.

It is an amenable number.

2129912 is a deficient number, since it is larger than the sum of its proper divisors (1863688).

2129912 is a wasteful number, since it uses less digits than its factorization.

2129912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266245 (or 266241 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

The square root of 2129912 is about 1459.4218033180. The cubic root of 2129912 is about 128.6630631879.

The spelling of 2129912 in words is "two million, one hundred twenty-nine thousand, nine hundred twelve".