840146 has 4 divisors (see below), whose sum is σ = 1260222. Its totient is φ = 420072.

The previous prime is 840139. The next prime is 840149. The reversal of 840146 is 641048.

It is a happy number.

840146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 436921 + 403225 = 661^2 + 635^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840146.

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 as a sum of consecutive naturals, namely, 210035 + ... + 210038.

2⁸⁴⁰¹⁴⁶ is an apocalyptic number.

840146 is a deficient number, since it is larger than the sum of its proper divisors (420076).

840146 is a wasteful number, since it uses less digits than its factorization.

840146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420075.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 840146 is about 916.5947850604. The cubic root of 840146 is about 94.3593458239.

The spelling of 840146 in words is "eight hundred forty thousand, one hundred forty-six".