2130865 has 32 divisors (see below), whose sum is σ = 3079296.
Its totient is φ = 1397760.
The previous prime is 2130857. The next prime is 2130901. The reversal of 2130865 is 5680312.
It is a happy number.
It is not a de Polignac number, because 2130865 - 23 = 2130857 is a prime.
It is a d-powerful number, because it can be written as 217 + 1 + 3 + 0 + 8 + 66 + 59 .
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40179 + ... + 40231.
It is an arithmetic number, because the mean of its divisors is an integer number (96228).
22130865 is an apocalyptic number.
It is an amenable number.
2130865 is a deficient number, since it is larger than the sum of its proper divisors (948431).
2130865 is a wasteful number, since it uses less digits than its factorization.
2130865 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 129.
The product of its (nonzero) digits is 1440, while the sum is 25.
The square root of 2130865 is about 1459.7482659692.
The cubic root of 2130865 is about 128.6822498360.
The spelling of 2130865 in words is "two million, one hundred thirty thousand, eight hundred sixty-five".