853421 has 8 divisors (see below), whose sum is σ = 887040. Its totient is φ = 820512.

The previous prime is 853403. The next prime is 853427. The reversal of 853421 is 124358.

853421 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 853421 - 2⁶ = 853357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853427) 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, 3716 + ... + 3938.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2⁸⁵³⁴²¹ is an apocalyptic number.

It is an amenable number.

853421 is a deficient number, since it is larger than the sum of its proper divisors (33619).

853421 is a wasteful number, since it uses less digits than its factorization.

853421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355.

The product of its digits is 960, while the sum is 23.

The square root of 853421 is about 923.8078804600. The cubic root of 853421 is about 94.8537361437.

Adding to 853421 its reverse (124358), we get a palindrome (977779).

The spelling of 853421 in words is "eight hundred fifty-three thousand, four hundred twenty-one".