2104139 has 2 divisors, whose sum is σ = 2104140. Its totient is φ = 2104138.

The previous prime is 2104129. The next prime is 2104147. The reversal of 2104139 is 9314012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2104139.

It is not a weakly prime, because it can be changed into another prime (2104129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052069 + 1052070.

It is an arithmetic number, because the mean of its divisors is an integer number (1052070).

2^2104139 is an apocalyptic number.

2104139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104139 is an equidigital number, since it uses as much as digits as its factorization.

2104139 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 2104139 is about 1450.5650623119. The cubic root of 2104139 is about 128.1419933043.

The spelling of 2104139 in words is "two million, one hundred four thousand, one hundred thirty-nine".