1271247132 has 48 divisors (see below), whose sum is σ = 3167539200. Its totient is φ = 395935680.

The previous prime is 1271247127. The next prime is 1271247139. The reversal of 1271247132 is 2317421721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271247132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271247139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48132 + ... + 69707.

It is an arithmetic number, because the mean of its divisors is an integer number (65990400).

Almost surely, 2^1271247132 is an apocalyptic number.

1271247132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1271247132 is an abundant number, since it is smaller than the sum of its proper divisors (1896292068).

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

1271247132 is a wasteful number, since it uses less digits than its factorization.

1271247132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117906 (or 117904 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 1271247132 is about 35654.5527527692. The cubic root of 1271247132 is about 1083.2864943746.

Adding to 1271247132 its reverse (2317421721), we get a palindrome (3588668853).

The spelling of 1271247132 in words is "one billion, two hundred seventy-one million, two hundred forty-seven thousand, one hundred thirty-two".