1225225212 has 24 divisors (see below), whose sum is σ = 2878050000. Its totient is φ = 405666816.

The previous prime is 1225225189. The next prime is 1225225217. The reversal of 1225225212 is 2125225221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225225217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340837 + ... + 344412.

It is an arithmetic number, because the mean of its divisors is an integer number (119918750).

Almost surely, 2^1225225212 is an apocalyptic number.

1225225212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225225212 is an abundant number, since it is smaller than the sum of its proper divisors (1652824788).

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

1225225212 is a wasteful number, since it uses less digits than its factorization.

1225225212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685405 (or 685403 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 1225225212 is about 35003.2171664263. The cubic root of 1225225212 is about 1070.0530477092.

Subtracting 1225225212 from its reverse (2125225221), we obtain a palindrome (900000009).

The spelling of 1225225212 in words is "one billion, two hundred twenty-five million, two hundred twenty-five thousand, two hundred twelve".