2144665 has 8 divisors (see below), whose sum is σ = 2585160. Its totient is φ = 1708032.

The previous prime is 2144647. The next prime is 2144671. The reversal of 2144665 is 5664412.

It can be written as a sum of positive squares in 4 ways, for example, as 824464 + 1320201 = 908^2 + 1149^2 .

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 2144665 - 2⁷ = 2144537 is a prime.

It is a congruent number.

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, 451 + ... + 2119.

It is an arithmetic number, because the mean of its divisors is an integer number (323145).

2^2144665 is an apocalyptic number.

It is an amenable number.

2144665 is a deficient number, since it is larger than the sum of its proper divisors (440495).

2144665 is a wasteful number, since it uses less digits than its factorization.

2144665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its digits is 5760, while the sum is 28.

The square root of 2144665 is about 1464.4674800077. The cubic root of 2144665 is about 128.9594448162.

It can be divided in two parts, 2144 and 665, that added together give a square (2809 = 53²).

The spelling of 2144665 in words is "two million, one hundred forty-four thousand, six hundred sixty-five".