2169129 has 4 divisors (see below), whose sum is σ = 2892176. Its totient is φ = 1446084.

The previous prime is 2169109. The next prime is 2169133. The reversal of 2169129 is 9219612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2169129 - 2¹³ = 2160937 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2169096 and 2169105.

It is not an unprimeable number, because it can be changed into a prime (2169109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361519 + ... + 361524.

It is an arithmetic number, because the mean of its divisors is an integer number (723044).

2^2169129 is an apocalyptic number.

It is an amenable number.

2169129 is a deficient number, since it is larger than the sum of its proper divisors (723047).

2169129 is an equidigital number, since it uses as much as digits as its factorization.

2169129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723046.

The product of its digits is 1944, while the sum is 30.

The square root of 2169129 is about 1472.7963199302. The cubic root of 2169129 is about 129.4479350240.

The spelling of 2169129 in words is "two million, one hundred sixty-nine thousand, one hundred twenty-nine".