1331271485 has 4 divisors (see below), whose sum is σ = 1597525788. Its totient is φ = 1065017184.

The previous prime is 1331271481. The next prime is 1331271493. The reversal of 1331271485 is 5841721331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5841721331 = 317 ⋅18428143.

It can be written as a sum of positive squares in 2 ways, for example, as 276191161 + 1055080324 = 16619^2 + 32482^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331271485 - 2² = 1331271481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331271481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133127144 + ... + 133127153.

It is an arithmetic number, because the mean of its divisors is an integer number (399381447).

Almost surely, 2^1331271485 is an apocalyptic number.

It is an amenable number.

1331271485 is a deficient number, since it is larger than the sum of its proper divisors (266254303).

1331271485 is an equidigital number, since it uses as much as digits as its factorization.

1331271485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266254302.

The product of its digits is 20160, while the sum is 35.

The square root of 1331271485 is about 36486.5932227168. The cubic root of 1331271485 is about 1100.0747841718.

The spelling of 1331271485 in words is "one billion, three hundred thirty-one million, two hundred seventy-one thousand, four hundred eighty-five".