1213412225 has 12 divisors (see below), whose sum is σ = 1545298044. Its totient is φ = 944493120.

The previous prime is 1213412209. The next prime is 1213412273. The reversal of 1213412225 is 5222143121.

It can be written as a sum of positive squares in 6 ways, for example, as 2093809 + 1211318416 = 1447^2 + 34804^2 .

It is not a de Polignac number, because 1213412225 - 2⁴ = 1213412209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213412225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654974 + ... + 656823.

It is an arithmetic number, because the mean of its divisors is an integer number (128774837).

Almost surely, 2^1213412225 is an apocalyptic number.

It is an amenable number.

1213412225 is a deficient number, since it is larger than the sum of its proper divisors (331885819).

1213412225 is a wasteful number, since it uses less digits than its factorization.

1213412225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311844 (or 1311839 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1213412225 is about 34834.0670177916. The cubic root of 1213412225 is about 1066.6029701005.

Adding to 1213412225 its reverse (5222143121), we get a palindrome (6435555346).

The spelling of 1213412225 in words is "one billion, two hundred thirteen million, four hundred twelve thousand, two hundred twenty-five".