853021 has 4 divisors (see below), whose sum is σ = 918652. Its totient is φ = 787392.

The previous prime is 853007. The next prime is 853031. The reversal of 853021 is 120358.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 562500 + 290521 = 750^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 853021 - 2⁵ = 852989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 853021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853031) 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, 32796 + ... + 32821.

It is an arithmetic number, because the mean of its divisors is an integer number (229663).

2⁸⁵³⁰²¹ is an apocalyptic number.

It is an amenable number.

853021 is a deficient number, since it is larger than the sum of its proper divisors (65631).

853021 is a wasteful number, since it uses less digits than its factorization.

853021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65630.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 853021 is about 923.5913598556. The cubic root of 853021 is about 94.8389144540.

Adding to 853021 its reverse (120358), we get a palindrome (973379).

The spelling of 853021 in words is "eight hundred fifty-three thousand, twenty-one".