1225415225 has 24 divisors (see below), whose sum is σ = 1534204632. Its totient is φ = 970905600.

The previous prime is 1225415221. The next prime is 1225415227. The reversal of 1225415225 is 5225145221.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 558329641 + 667085584 = 23629^2 + 25828^2 .

It is not a de Polignac number, because 1225415225 - 2² = 1225415221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225415221) 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 23 ways as a sum of consecutive naturals, for example, 1820489 + ... + 1821161.

It is an arithmetic number, because the mean of its divisors is an integer number (63925193).

Almost surely, 2^1225415225 is an apocalyptic number.

It is an amenable number.

1225415225 is a deficient number, since it is larger than the sum of its proper divisors (308789407).

1225415225 is a wasteful number, since it uses less digits than its factorization.

1225415225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1272 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 1225415225 is about 35005.9312831411. The cubic root of 1225415225 is about 1070.1083609359.

The spelling of 1225415225 in words is "one billion, two hundred twenty-five million, four hundred fifteen thousand, two hundred twenty-five".