5821212 has 12 divisors (see below), whose sum is σ = 13582856. Its totient is φ = 1940400.

The previous prime is 5821183. The next prime is 5821213. The reversal of 5821212 is 2121285.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242539 + ... + 242562.

Almost surely, 2^5821212 is an apocalyptic number.

It is an amenable number.

5821212 is an abundant number, since it is smaller than the sum of its proper divisors (7761644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5821212 is a wasteful number, since it uses less digits than its factorization.

5821212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485108 (or 485106 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 5821212 is about 2412.7187983683. The cubic root of 5821212 is about 179.8889438405. Note that the first 3 decimals are identical.

Adding to 5821212 its reverse (2121285), we get a palindrome (7942497).

The spelling of 5821212 in words is "five million, eight hundred twenty-one thousand, two hundred twelve".