84212225 has 6 divisors (see below), whose sum is σ = 104423190. Its totient is φ = 67369760.

The previous prime is 84212221. The next prime is 84212243. The reversal of 84212225 is 52221248.

It can be written as a sum of positive squares in 3 ways, for example, as 1329409 + 82882816 = 1153^2 + 9104^2 .

It is not a de Polignac number, because 84212225 - 2² = 84212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84212194 and 84212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84212221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1684220 + ... + 1684269.

It is an arithmetic number, because the mean of its divisors is an integer number (17403865).

Almost surely, 2^84212225 is an apocalyptic number.

It is an amenable number.

84212225 is a deficient number, since it is larger than the sum of its proper divisors (20210965).

84212225 is a wasteful number, since it uses less digits than its factorization.

84212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368499 (or 3368494 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 84212225 is about 9176.7219092659. The cubic root of 84212225 is about 438.3204305775.

The spelling of 84212225 in words is "eighty-four million, two hundred twelve thousand, two hundred twenty-five".