840011 has 8 divisors (see below), whose sum is σ = 877344. Its totient is φ = 803520.

The previous prime is 839999. The next prime is 840023. The reversal of 840011 is 110048.

It is a happy number.

840011 is nontrivially palindromic in base 8.

840011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (839999) and next prime (840023).

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 840011 - 2¹⁸ = 577867 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840011.

It is not an unprimeable number, because it can be changed into a prime (840061) 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, 2546 + ... + 2856.

It is an arithmetic number, because the mean of its divisors is an integer number (109668).

2⁸⁴⁰⁰¹¹ is an apocalyptic number.

840011 is a deficient number, since it is larger than the sum of its proper divisors (37333).

840011 is a wasteful number, since it uses less digits than its factorization.

840011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 840011 is about 916.5211399635. The cubic root of 840011 is about 94.3542914667.

Adding to 840011 its reverse (110048), we get a palindrome (950059).

The spelling of 840011 in words is "eight hundred forty thousand, eleven".