840141 has 12 divisors (see below), whose sum is σ = 1221532. Its totient is φ = 556416.

The previous prime is 840139. The next prime is 840149. The reversal of 840141 is 141048.

It can be written as a sum of positive squares in 2 ways, for example, as 184041 + 656100 = 429^2 + 810^2 .

It is not a de Polignac number, because 840141 - 2¹ = 840139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840141.

It is not an unprimeable number, because it can be changed into a prime (840149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2325 + ... + 2661.

2⁸⁴⁰¹⁴¹ is an apocalyptic number.

It is an amenable number.

840141 is a deficient number, since it is larger than the sum of its proper divisors (381391).

840141 is a wasteful number, since it uses less digits than its factorization.

840141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 840141 is about 916.5920575698. The cubic root of 840141 is about 94.3591586352.

Adding to 840141 its reverse (141048), we get a palindrome (981189).

The spelling of 840141 in words is "eight hundred forty thousand, one hundred forty-one".