1306252220242 has 4 divisors (see below), whose sum is σ = 1959378330366. Its totient is φ = 653126110120.

The previous prime is 1306252220233. The next prime is 1306252220281. The reversal of 1306252220242 is 2420222526031.

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., 1091567337961 + 214684882281 = 1044781^2 + 463341^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326563055059 + ... + 326563055062.

Almost surely, 2^{1306252220242} is an apocalyptic number.

1306252220242 is a deficient number, since it is larger than the sum of its proper divisors (653126110124).

1306252220242 is an equidigital number, since it uses as much as digits as its factorization.

1306252220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653126110123.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1306252220242 its reverse (2420222526031), we get a palindrome (3726474746273).

The spelling of 1306252220242 in words is "one trillion, three hundred six billion, two hundred fifty-two million, two hundred twenty thousand, two hundred forty-two".