2165129 has 8 divisors (see below), whose sum is σ = 2243520. Its totient is φ = 2087856.

The previous prime is 2165117. The next prime is 2165131. The reversal of 2165129 is 9215612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2165129 - 2¹⁶ = 2099593 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165098 and 2165107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5852 + ... + 6210.

It is an arithmetic number, because the mean of its divisors is an integer number (280440).

2^2165129 is an apocalyptic number.

It is an amenable number.

2165129 is a deficient number, since it is larger than the sum of its proper divisors (78391).

2165129 is a wasteful number, since it uses less digits than its factorization.

2165129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559.

The product of its digits is 1080, while the sum is 26.

The square root of 2165129 is about 1471.4377322877. The cubic root of 2165129 is about 129.3683162237.

The spelling of 2165129 in words is "two million, one hundred sixty-five thousand, one hundred twenty-nine".