2101439 has 2 divisors, whose sum is σ = 2101440. Its totient is φ = 2101438.

The previous prime is 2101433. The next prime is 2101447. The reversal of 2101439 is 9341012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101439 - 2⁴ = 2101423 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050719 + 1050720.

It is an arithmetic number, because the mean of its divisors is an integer number (1050720).

2^2101439 is an apocalyptic number.

2101439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101439 is an equidigital number, since it uses as much as digits as its factorization.

2101439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2101439 is about 1449.6340917625. The cubic root of 2101439 is about 128.0871598745.

The spelling of 2101439 in words is "two million, one hundred one thousand, four hundred thirty-nine".