840052 has 18 divisors (see below), whose sum is σ = 1540658. Its totient is φ = 400752.

The previous prime is 840023. The next prime is 840053. The reversal of 840052 is 250048.

It is a happy number.

840052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 763876 + 76176 = 874^2 + 276^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840053) by changing a digit.

840052 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1918 + ... + 2314.

2⁸⁴⁰⁰⁵² is an apocalyptic number.

It is an amenable number.

840052 is a deficient number, since it is larger than the sum of its proper divisors (700606).

840052 is a wasteful number, since it uses less digits than its factorization.

840052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 840052 is about 916.5435068779. The cubic root of 840052 is about 94.3558265510.

The spelling of 840052 in words is "eight hundred forty thousand, fifty-two".