2165039 has 2 divisors, whose sum is σ = 2165040. Its totient is φ = 2165038.

The previous prime is 2165029. The next prime is 2165047. The reversal of 2165039 is 9305612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165039 is a prime.

It is a Chen prime.

It is equal to p₁₆₀₂₉₈ and since 2165039 and 160298 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 2164999 and 2165017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082519 + 1082520.

It is an arithmetic number, because the mean of its divisors is an integer number (1082520).

2^2165039 is an apocalyptic number.

2165039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165039 is an equidigital number, since it uses as much as digits as its factorization.

2165039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2165039 is about 1471.4071496360. The cubic root of 2165039 is about 129.3665236732.

It can be divided in two parts, 21650 and 39, that multiplied together give a triangular number (844350 = T₁₂₉₉).

The spelling of 2165039 in words is "two million, one hundred sixty-five thousand, thirty-nine".