1311229085 has 8 divisors (see below), whose sum is σ = 1573808856. Its totient is φ = 1048760640.

The previous prime is 1311229043. The next prime is 1311229093. The reversal of 1311229085 is 5809221131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 267551449 + 1043677636 = 16357^2 + 32306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311229085 - 2⁶ = 1311229021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755 + ... + 51215.

It is an arithmetic number, because the mean of its divisors is an integer number (196726107).

Almost surely, 2^1311229085 is an apocalyptic number.

It is an amenable number.

1311229085 is a deficient number, since it is larger than the sum of its proper divisors (262579771).

1311229085 is an equidigital number, since it uses as much as digits as its factorization.

1311229085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55663.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1311229085 is about 36210.8973238720. The cubic root of 1311229085 is about 1094.5262742365.

The spelling of 1311229085 in words is "one billion, three hundred eleven million, two hundred twenty-nine thousand, eighty-five".