1271303166 has 32 divisors (see below), whose sum is σ = 2933003520. Its totient is φ = 359833536.

The previous prime is 1271303161. The next prime is 1271303171. The reversal of 1271303166 is 6613031721.

It is an interprime number because it is at equal distance from previous prime (1271303161) and next prime (1271303171).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271303161) 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 15 ways as a sum of consecutive naturals, for example, 136951 + ... + 145938.

It is an arithmetic number, because the mean of its divisors is an integer number (91656360).

Almost surely, 2^1271303166 is an apocalyptic number.

1271303166 is an abundant number, since it is smaller than the sum of its proper divisors (1661700354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271303166 is a wasteful number, since it uses less digits than its factorization.

1271303166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283008.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1271303166 is about 35655.3385343626. The cubic root of 1271303166 is about 1083.3024104993.

Adding to 1271303166 its reverse (6613031721), we get a palindrome (7884334887).

The spelling of 1271303166 in words is "one billion, two hundred seventy-one million, three hundred three thousand, one hundred sixty-six".