1271729372 has 6 divisors (see below), whose sum is σ = 2225526408. Its totient is φ = 635864684.

The previous prime is 1271729369. The next prime is 1271729377. The reversal of 1271729372 is 2739271721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271729377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158966168 + ... + 158966175.

It is an arithmetic number, because the mean of its divisors is an integer number (370921068).

Almost surely, 2^1271729372 is an apocalyptic number.

It is an amenable number.

1271729372 is a deficient number, since it is larger than the sum of its proper divisors (953797036).

1271729372 is a wasteful number, since it uses less digits than its factorization.

1271729372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317932347 (or 317932345 counting only the distinct ones).

The product of its digits is 74088, while the sum is 41.

The square root of 1271729372 is about 35661.3147822679. The cubic root of 1271729372 is about 1083.4234564761.

The spelling of 1271729372 in words is "one billion, two hundred seventy-one million, seven hundred twenty-nine thousand, three hundred seventy-two".