2126639 has 2 divisors, whose sum is σ = 2126640. Its totient is φ = 2126638.

The previous prime is 2126633. The next prime is 2126659. The reversal of 2126639 is 9366212.

2126639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2126639 - 2⁴ = 2126623 is a prime.

It is a d-powerful number, because it can be written as 2 + 1 + 2²¹ + 6⁴ + 6⁵ + 3⁹ + 9³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126633) 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, 1063319 + 1063320.

It is an arithmetic number, because the mean of its divisors is an integer number (1063320).

2^2126639 is an apocalyptic number.

2126639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126639 is an equidigital number, since it uses as much as digits as its factorization.

2126639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 2126639 is about 1458.3000377151. The cubic root of 2126639 is about 128.5971246113.

The spelling of 2126639 in words is "two million, one hundred twenty-six thousand, six hundred thirty-nine".