2175641 has 8 divisors (see below), whose sum is σ = 2367624. Its totient is φ = 1987200.

The previous prime is 2175629. The next prime is 2175659. The reversal of 2175641 is 1465712.

It can be written as a sum of positive squares in 4 ways, for example, as 326041 + 1849600 = 571^2 + 1360^2 .

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 2175641 - 2⁶ = 2175577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2175641.

It is not an unprimeable number, because it can be changed into a prime (2175601) 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, 485 + ... + 2141.

It is an arithmetic number, because the mean of its divisors is an integer number (295953).

2^2175641 is an apocalyptic number.

It is an amenable number.

2175641 is a deficient number, since it is larger than the sum of its proper divisors (191983).

2175641 is a wasteful number, since it uses less digits than its factorization.

2175641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its digits is 1680, while the sum is 26.

The square root of 2175641 is about 1475.0054237188. The cubic root of 2175641 is about 129.5773453072.

The spelling of 2175641 in words is "two million, one hundred seventy-five thousand, six hundred forty-one".