1271972512 has 24 divisors (see below), whose sum is σ = 2510827200. Its totient is φ = 634302144.

The previous prime is 1271972497. The next prime is 1271972539. The reversal of 1271972512 is 2152791721.

It is a happy number.

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, 40312 + ... + 64567.

It is an arithmetic number, because the mean of its divisors is an integer number (104617800).

Almost surely, 2^1271972512 is an apocalyptic number.

It is an amenable number.

1271972512 is a deficient number, since it is larger than the sum of its proper divisors (1238854688).

1271972512 is a wasteful number, since it uses less digits than its factorization.

1271972512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105268 (or 105260 counting only the distinct ones).

The product of its digits is 17640, while the sum is 37.

The square root of 1271972512 is about 35664.7236355478. The cubic root of 1271972512 is about 1083.4924981027.

The spelling of 1271972512 in words is "one billion, two hundred seventy-one million, nine hundred seventy-two thousand, five hundred twelve".