8212081 has 4 divisors (see below), whose sum is σ = 8569152. Its totient is φ = 7855012.

The previous prime is 8212067. The next prime is 8212091. The reversal of 8212081 is 1802128.

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 8212081 - 2⁷ = 8211953 is a prime.

It is a super-2 number, since 2×8212081² = 134876548701122, which contains 22 as substring.

It is a Duffinian number.

8212081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8212021) 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, 178501 + ... + 178546.

It is an arithmetic number, because the mean of its divisors is an integer number (2142288).

Almost surely, 2^8212081 is an apocalyptic number.

It is an amenable number.

8212081 is a deficient number, since it is larger than the sum of its proper divisors (357071).

8212081 is a wasteful number, since it uses less digits than its factorization.

8212081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357070.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 8212081 is about 2865.6728703744. The cubic root of 8212081 is about 201.7519502081.

The spelling of 8212081 in words is "eight million, two hundred twelve thousand, eighty-one".