840245 has 8 divisors (see below), whose sum is σ = 1152384. Its totient is φ = 576144.

The previous prime is 840241. The next prime is 840253. The reversal of 840245 is 542048.

840245 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 a cyclic number.

It is not a de Polignac number, because 840245 - 2² = 840241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 840245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840241) 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, 11969 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (144048).

2⁸⁴⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

840245 is a deficient number, since it is larger than the sum of its proper divisors (312139).

840245 is a wasteful number, since it uses less digits than its factorization.

840245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24019.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 840245 is about 916.6487877044. The cubic root of 840245 is about 94.3630520085.

The spelling of 840245 in words is "eight hundred forty thousand, two hundred forty-five".