2128667 has 2 divisors, whose sum is σ = 2128668. Its totient is φ = 2128666.

The previous prime is 2128663. The next prime is 2128669. The reversal of 2128667 is 7668212.

2128667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2128667 - 2² = 2128663 is a prime.

Together with 2128669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2128663) by changing a digit.

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 as a sum of consecutive naturals, namely, 1064333 + 1064334.

It is an arithmetic number, because the mean of its divisors is an integer number (1064334).

2^2128667 is an apocalyptic number.

2128667 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128667 is an equidigital number, since it uses as much as digits as its factorization.

2128667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 2128667 is about 1458.9952021854. The cubic root of 2128667 is about 128.6379891105.

The spelling of 2128667 in words is "two million, one hundred twenty-eight thousand, six hundred sixty-seven".