840049 has 8 divisors (see below), whose sum is σ = 983808. Its totient is φ = 702240.

The previous prime is 840023. The next prime is 840053. The reversal of 840049 is 940048.

840049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840049 - 2⁷ = 839921 is a prime.

840049 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (840149) 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, 1177 + ... + 1750.

It is an arithmetic number, because the mean of its divisors is an integer number (122976).

2⁸⁴⁰⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

840049 is a deficient number, since it is larger than the sum of its proper divisors (143759).

840049 is a wasteful number, since it uses less digits than its factorization.

840049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 840049 is about 916.5418702929. The cubic root of 840049 is about 94.3557142294.

Subtracting 840049 from its reverse (940048), we obtain a palindrome (99999).

The spelling of 840049 in words is "eight hundred forty thousand, forty-nine".