2168641 has 8 divisors (see below), whose sum is σ = 2300480. Its totient is φ = 2038608.

The previous prime is 2168623. The next prime is 2168651. The reversal of 2168641 is 1468612.

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 2168641 - 2⁵ = 2168609 is a prime.

It is a Duffinian number.

2168641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2168651) 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, 2620 + ... + 3346.

It is an arithmetic number, because the mean of its divisors is an integer number (287560).

2^2168641 is an apocalyptic number.

It is an amenable number.

2168641 is a deficient number, since it is larger than the sum of its proper divisors (131839).

2168641 is a wasteful number, since it uses less digits than its factorization.

2168641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its digits is 2304, while the sum is 28.

The square root of 2168641 is about 1472.6306393662. The cubic root of 2168641 is about 129.4382267755.

It can be divided in two parts, 2168 and 641, that added together give a square (2809 = 53²).

The spelling of 2168641 in words is "two million, one hundred sixty-eight thousand, six hundred forty-one".