849641 has 4 divisors (see below), whose sum is σ = 915012. Its totient is φ = 784272.

The previous prime is 849601. The next prime is 849649. The reversal of 849641 is 146948.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 354025 = 704^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 849641 - 2¹⁸ = 587497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 849598 and 849607.

It is not an unprimeable number, because it can be changed into a prime (849649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32666 + ... + 32691.

It is an arithmetic number, because the mean of its divisors is an integer number (228753).

2⁸⁴⁹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

849641 is a deficient number, since it is larger than the sum of its proper divisors (65371).

849641 is a wasteful number, since it uses less digits than its factorization.

849641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65370.

The product of its digits is 6912, while the sum is 32.

The square root of 849641 is about 921.7597300815. The cubic root of 849641 is about 94.7134857898.

The spelling of 849641 in words is "eight hundred forty-nine thousand, six hundred forty-one".