2146665 has 8 divisors (see below), whose sum is σ = 3434688. Its totient is φ = 1144880.

The previous prime is 2146663. The next prime is 2146673. The reversal of 2146665 is 5666412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2146665 - 2¹ = 2146663 is a prime.

2146665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2146663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71541 + ... + 71570.

It is an arithmetic number, because the mean of its divisors is an integer number (429336).

2^2146665 is an apocalyptic number.

It is an amenable number.

2146665 is a deficient number, since it is larger than the sum of its proper divisors (1288023).

2146665 is a wasteful number, since it uses less digits than its factorization.

2146665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143119.

The product of its digits is 8640, while the sum is 30.

The square root of 2146665 is about 1465.1501629526. The cubic root of 2146665 is about 128.9995192579. Note that the first 3 decimals are identical.

The spelling of 2146665 in words is "two million, one hundred forty-six thousand, six hundred sixty-five".