1305641512226 has 4 divisors (see below), whose sum is σ = 1958462268342. Its totient is φ = 652820756112.

The previous prime is 1305641512163. The next prime is 1305641512303. The reversal of 1305641512226 is 6222151465031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1152370045225 + 153271467001 = 1073485^2 + 391499^2 .

It is a super-2 number, since 2×1305641512226² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305641512226.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326410378055 + ... + 326410378058.

Almost surely, 2^{1305641512226} is an apocalyptic number.

1305641512226 is a deficient number, since it is larger than the sum of its proper divisors (652820756116).

1305641512226 is an equidigital number, since it uses as much as digits as its factorization.

1305641512226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652820756115.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 1305641512226 its reverse (6222151465031), we get a palindrome (7527792977257).

The spelling of 1305641512226 in words is "one trillion, three hundred five billion, six hundred forty-one million, five hundred twelve thousand, two hundred twenty-six".