1306251442 has 4 divisors (see below), whose sum is σ = 1959377166. Its totient is φ = 653125720.

The previous prime is 1306251413. The next prime is 1306251467. The reversal of 1306251442 is 2441526031.

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., 1029062241 + 277189201 = 32079^2 + 16649^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1306251442.

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, 326562859 + ... + 326562862.

Almost surely, 2^1306251442 is an apocalyptic number.

1306251442 is a deficient number, since it is larger than the sum of its proper divisors (653125724).

1306251442 is an equidigital number, since it uses as much as digits as its factorization.

1306251442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653125723.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1306251442 is about 36142.1006860420. The cubic root of 1306251442 is about 1093.1395168990.

Adding to 1306251442 its reverse (2441526031), we get a palindrome (3747777473).

The spelling of 1306251442 in words is "one billion, three hundred six million, two hundred fifty-one thousand, four hundred forty-two".