1311428158 has 4 divisors (see below), whose sum is σ = 1967142240. Its totient is φ = 655714078.

The previous prime is 1311428141. The next prime is 1311428201. The reversal of 1311428158 is 8518241131.

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

It is a congruent 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, 327857038 + ... + 327857041.

It is an arithmetic number, because the mean of its divisors is an integer number (491785560).

Almost surely, 2^1311428158 is an apocalyptic number.

1311428158 is a deficient number, since it is larger than the sum of its proper divisors (655714082).

1311428158 is an equidigital number, since it uses as much as digits as its factorization.

1311428158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655714081.

The product of its digits is 7680, while the sum is 34.

The square root of 1311428158 is about 36213.6460191459. The cubic root of 1311428158 is about 1094.5816623721.

Adding to 1311428158 its reverse (8518241131), we get a palindrome (9829669289).

The spelling of 1311428158 in words is "one billion, three hundred eleven million, four hundred twenty-eight thousand, one hundred fifty-eight".