8212129 has 4 divisors (see below), whose sum is σ = 8316160. Its totient is φ = 8108100.

The previous prime is 8212109. The next prime is 8212147. The reversal of 8212129 is 9212128.

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 8212129 - 2¹⁷ = 8081057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8212109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51897 + ... + 52054.

It is an arithmetic number, because the mean of its divisors is an integer number (2079040).

Almost surely, 2^8212129 is an apocalyptic number.

It is an amenable number.

8212129 is a deficient number, since it is larger than the sum of its proper divisors (104031).

8212129 is a wasteful number, since it uses less digits than its factorization.

8212129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104030.

The product of its digits is 576, while the sum is 25.

The square root of 8212129 is about 2865.6812453586. The cubic root of 8212129 is about 201.7523432905.

Subtracting 8212129 from its reverse (9212128), we obtain a palindrome (999999).

The spelling of 8212129 in words is "eight million, two hundred twelve thousand, one hundred twenty-nine".