1331075871 has 6 divisors (see below), whose sum is σ = 1922665160. Its totient is φ = 887383908.

The previous prime is 1331075857. The next prime is 1331075873. The reversal of 1331075871 is 1785701331.

It is a happy number.

It is not a de Polignac number, because 1331075871 - 2⁵ = 1331075839 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 (1331075873) 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 5 ways as a sum of consecutive naturals, for example, 73948651 + ... + 73948668.

Almost surely, 2^1331075871 is an apocalyptic number.

1331075871 is a deficient number, since it is larger than the sum of its proper divisors (591589289).

1331075871 is a wasteful number, since it uses less digits than its factorization.

1331075871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147897325 (or 147897322 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1331075871 is about 36483.9124957837. The cubic root of 1331075871 is about 1100.0209007048.

The spelling of 1331075871 in words is "one billion, three hundred thirty-one million, seventy-five thousand, eight hundred seventy-one".