2159129 has 4 divisors (see below), whose sum is σ = 2467584. Its totient is φ = 1850676.

The previous prime is 2159093. The next prime is 2159147. The reversal of 2159129 is 9219512.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2159129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159329) 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, 154217 + ... + 154230.

It is an arithmetic number, because the mean of its divisors is an integer number (616896).

2^2159129 is an apocalyptic number.

It is an amenable number.

2159129 is a deficient number, since it is larger than the sum of its proper divisors (308455).

2159129 is an equidigital number, since it uses as much as digits as its factorization.

2159129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308454.

The product of its digits is 1620, while the sum is 29.

The square root of 2159129 is about 1469.3974955743. The cubic root of 2159129 is about 129.2487039491.

The spelling of 2159129 in words is "two million, one hundred fifty-nine thousand, one hundred twenty-nine".