2130665 has 8 divisors (see below), whose sum is σ = 2566080. Its totient is φ = 1698352.

The previous prime is 2130631. The next prime is 2130671. The reversal of 2130665 is 5660312.

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 2130665 - 2²⁰ = 1082089 is a prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 2130665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1202 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

2^2130665 is an apocalyptic number.

It is an amenable number.

2130665 is a deficient number, since it is larger than the sum of its proper divisors (435415).

2130665 is a wasteful number, since it uses less digits than its factorization.

2130665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2130665 is about 1459.6797593993. The cubic root of 2130665 is about 128.6782237315.

Adding to 2130665 its reverse (5660312), we get a palindrome (7790977).

The spelling of 2130665 in words is "two million, one hundred thirty thousand, six hundred sixty-five".