1225179225 has 36 divisors (see below), whose sum is σ = 2196343552. Its totient is φ = 652860000.

The previous prime is 1225179209. The next prime is 1225179227. The reversal of 1225179225 is 5229715221.

It is not a de Polignac number, because 1225179225 - 2⁴ = 1225179209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225179225.

It is not an unprimeable number, because it can be changed into a prime (1225179227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 437580 + ... + 440370.

Almost surely, 2^1225179225 is an apocalyptic number.

1225179225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225179225 is a deficient number, since it is larger than the sum of its proper divisors (971164327).

1225179225 is a wasteful number, since it uses less digits than its factorization.

1225179225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758 (or 4750 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1225179225 is about 35002.5602635007. The cubic root of 1225179225 is about 1070.0396599269.

The spelling of 1225179225 in words is "one billion, two hundred twenty-five million, one hundred seventy-nine thousand, two hundred twenty-five".