2144645 has 8 divisors (see below), whose sum is σ = 2622456. Its totient is φ = 1683136.

The previous prime is 2144641. The next prime is 2144647. The reversal of 2144645 is 5464412.

It can be written as a sum of positive squares in 4 ways, for example, as 332929 + 1811716 = 577^2 + 1346^2 .

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 2144645 - 2² = 2144641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144641) 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, 3782 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (327807).

2^2144645 is an apocalyptic number.

It is an amenable number.

2144645 is a deficient number, since it is larger than the sum of its proper divisors (477811).

2144645 is an equidigital number, since it uses as much as digits as its factorization.

2144645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151.

The product of its digits is 3840, while the sum is 26.

The square root of 2144645 is about 1464.4606515711. The cubic root of 2144645 is about 128.9590439460.

The spelling of 2144645 in words is "two million, one hundred forty-four thousand, six hundred forty-five".