1225424065 has 8 divisors (see below), whose sum is σ = 1472237928. Its totient is φ = 979186560.

The previous prime is 1225424033. The next prime is 1225424071. The reversal of 1225424065 is 5604245221.

It can be written as a sum of positive squares in 4 ways, for example, as 216472369 + 1008951696 = 14713^2 + 31764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225424065 - 2⁵ = 1225424033 is a prime.

It is a super-2 number, since 2×1225424065² = 3003328278162248450, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 139396 + ... + 147925.

It is an arithmetic number, because the mean of its divisors is an integer number (184029741).

Almost surely, 2^1225424065 is an apocalyptic number.

It is an amenable number.

1225424065 is a deficient number, since it is larger than the sum of its proper divisors (246813863).

1225424065 is an equidigital number, since it uses as much as digits as its factorization.

1225424065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288179.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1225424065 is about 35006.0575472303. The cubic root of 1225424065 is about 1070.1109341413.

Adding to 1225424065 its reverse (5604245221), we get a palindrome (6829669286).

The spelling of 1225424065 in words is "one billion, two hundred twenty-five million, four hundred twenty-four thousand, sixty-five".