854639 has 8 divisors (see below), whose sum is σ = 929280. Its totient is φ = 783000.

The previous prime is 854629. The next prime is 854647. The reversal of 854639 is 936458.

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 854639 - 2⁸ = 854383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 854599 and 854608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 1314.

It is an arithmetic number, because the mean of its divisors is an integer number (116160).

2⁸⁵⁴⁶³⁹ is an apocalyptic number.

854639 is a deficient number, since it is larger than the sum of its proper divisors (74641).

854639 is a wasteful number, since it uses less digits than its factorization.

854639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its digits is 25920, while the sum is 35.

The square root of 854639 is about 924.4668733924. The cubic root of 854639 is about 94.8988396866.

The spelling of 854639 in words is "eight hundred fifty-four thousand, six hundred thirty-nine".