840134 has 8 divisors (see below), whose sum is σ = 1289640. Its totient is φ = 410256.

The previous prime is 840109. The next prime is 840137. The reversal of 840134 is 431048.

840134 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 Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4799 + ... + 4970.

It is an arithmetic number, because the mean of its divisors is an integer number (161205).

2⁸⁴⁰¹³⁴ is an apocalyptic number.

840134 is a deficient number, since it is larger than the sum of its proper divisors (449506).

840134 is a wasteful number, since it uses less digits than its factorization.

840134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9814.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 840134 is about 916.5882390692. The cubic root of 840134 is about 94.3588965697.

The spelling of 840134 in words is "eight hundred forty thousand, one hundred thirty-four".