1226325565 has 4 divisors (see below), whose sum is σ = 1471590684. Its totient is φ = 981060448.

The previous prime is 1226325563. The next prime is 1226325619. The reversal of 1226325565 is 5655236221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5655236221 = 367 ⋅15409363.

It can be written as a sum of positive squares in 2 ways, for example, as 569633689 + 656691876 = 23867^2 + 25626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226325565 - 2¹ = 1226325563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226325563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122632552 + ... + 122632561.

It is an arithmetic number, because the mean of its divisors is an integer number (367897671).

Almost surely, 2^1226325565 is an apocalyptic number.

It is an amenable number.

1226325565 is a deficient number, since it is larger than the sum of its proper divisors (245265119).

1226325565 is an equidigital number, since it uses as much as digits as its factorization.

1226325565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245265118.

The product of its digits is 108000, while the sum is 37.

The square root of 1226325565 is about 35018.9315228206. The cubic root of 1226325565 is about 1070.3732837407.

The spelling of 1226325565 in words is "one billion, two hundred twenty-six million, three hundred twenty-five thousand, five hundred sixty-five".