2129605 has 8 divisors (see below), whose sum is σ = 2599200. Its totient is φ = 1674576.

The previous prime is 2129599. The next prime is 2129627. The reversal of 2129605 is 5069212.

2129605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2129605 - 2³ = 2129597 is a prime.

2129605 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2129605.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 3315 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (324900).

2^2129605 is an apocalyptic number.

It is an amenable number.

2129605 is a deficient number, since it is larger than the sum of its proper divisors (469595).

2129605 is an equidigital number, since it uses as much as digits as its factorization.

2129605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7283.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2129605 is about 1459.3166208880. The cubic root of 2129605 is about 128.6568811706.

The spelling of 2129605 in words is "two million, one hundred twenty-nine thousand, six hundred five".