1271972456 has 16 divisors (see below), whose sum is σ = 2399582400. Its totient is φ = 632083824.

The previous prime is 1271972431. The next prime is 1271972477. The reversal of 1271972456 is 6542791721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486416 + ... + 489023.

It is an arithmetic number, because the mean of its divisors is an integer number (149973900).

Almost surely, 2^1271972456 is an apocalyptic number.

It is an amenable number.

1271972456 is a deficient number, since it is larger than the sum of its proper divisors (1127609944).

1271972456 is a wasteful number, since it uses less digits than its factorization.

1271972456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975608 (or 975604 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The square root of 1271972456 is about 35664.7228504583. The cubic root of 1271972456 is about 1083.4924822020.

The spelling of 1271972456 in words is "one billion, two hundred seventy-one million, nine hundred seventy-two thousand, four hundred fifty-six".