2129187 has 4 divisors (see below), whose sum is σ = 2838920. Its totient is φ = 1419456.

The previous prime is 2129177. The next prime is 2129203. The reversal of 2129187 is 7819212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2129187 - 2⁶ = 2129123 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129107) 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, 354862 + ... + 354867.

It is an arithmetic number, because the mean of its divisors is an integer number (709730).

2^2129187 is an apocalyptic number.

2129187 is a deficient number, since it is larger than the sum of its proper divisors (709733).

2129187 is an equidigital number, since it uses as much as digits as its factorization.

2129187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709732.

The product of its digits is 2016, while the sum is 30.

The square root of 2129187 is about 1459.1733961391. The cubic root of 2129187 is about 128.6484630062.

The spelling of 2129187 in words is "two million, one hundred twenty-nine thousand, one hundred eighty-seven".