2128635 has 12 divisors (see below), whose sum is σ = 3689712. Its totient is φ = 1135248.

The previous prime is 2128631. The next prime is 2128649. The reversal of 2128635 is 5368212.

2128635 is a `hidden beast` number, since 2 + 1 + 28 + 635 = 666.

It is not a de Polignac number, because 2128635 - 2² = 2128631 is a prime.

2128635 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2128599 and 2128608.

It is not an unprimeable number, because it can be changed into a prime (2128631) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 23607 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (307476).

2^2128635 is an apocalyptic number.

2128635 is a deficient number, since it is larger than the sum of its proper divisors (1561077).

2128635 is a wasteful number, since it uses less digits than its factorization.

2128635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47314 (or 47311 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2128635 is about 1458.9842356928. The cubic root of 2128635 is about 128.6373445074.

It can be divided in two parts, 21286 and 35, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 2128635 in words is "two million, one hundred twenty-eight thousand, six hundred thirty-five".