1271431072 has 24 divisors (see below), whose sum is σ = 2537424036. Its totient is φ = 627005952.

The previous prime is 1271431067. The next prime is 1271431087. The reversal of 1271431072 is 2701341721.

It can be written as a sum of positive squares in 2 ways, for example, as 1238758416 + 32672656 = 35196^2 + 5716^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1271431072.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269803 + ... + 274474.

Almost surely, 2^1271431072 is an apocalyptic number.

It is an amenable number.

1271431072 is a deficient number, since it is larger than the sum of its proper divisors (1265992964).

1271431072 is an equidigital number, since it uses as much as digits as its factorization.

1271431072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544360 (or 544352 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1271431072 is about 35657.1321336980. The cubic root of 1271431072 is about 1083.3387396864.

Adding to 1271431072 its reverse (2701341721), we get a palindrome (3972772793).

The spelling of 1271431072 in words is "one billion, two hundred seventy-one million, four hundred thirty-one thousand, seventy-two".