1225279325 has 12 divisors (see below), whose sum is σ = 1527307008. Its totient is φ = 975087600.

The previous prime is 1225279273. The next prime is 1225279343. The reversal of 1225279325 is 5239725221.

It is not a de Polignac number, because 1225279325 - 2¹² = 1225275229 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 123527 + ... + 133076.

It is an arithmetic number, because the mean of its divisors is an integer number (127275584).

Almost surely, 2^1225279325 is an apocalyptic number.

It is an amenable number.

1225279325 is a deficient number, since it is larger than the sum of its proper divisors (302027683).

1225279325 is a wasteful number, since it uses less digits than its factorization.

1225279325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256804 (or 256799 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 1225279325 is about 35003.9901296981. The cubic root of 1225279325 is about 1070.0688007119.

The spelling of 1225279325 in words is "one billion, two hundred twenty-five million, two hundred seventy-nine thousand, three hundred twenty-five".