862021 has 4 divisors (see below), whose sum is σ = 882112. Its totient is φ = 841932.

The previous prime is 862013. The next prime is 862031. The reversal of 862021 is 120268.

It is a happy number.

862021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 862021 - 2³ = 862013 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 862021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862031) 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, 9981 + ... + 10066.

It is an arithmetic number, because the mean of its divisors is an integer number (220528).

2⁸⁶²⁰²¹ is an apocalyptic number.

It is an amenable number.

862021 is a deficient number, since it is larger than the sum of its proper divisors (20091).

862021 is a wasteful number, since it uses less digits than its factorization.

862021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20090.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 862021 is about 928.4508603044. The cubic root of 862021 is about 95.1712883899.

Adding to 862021 its reverse (120268), we get a palindrome (982289).

The spelling of 862021 in words is "eight hundred sixty-two thousand, twenty-one".