1271972472 has 32 divisors (see below), whose sum is σ = 3201282000. Its totient is φ = 421144064.

The previous prime is 1271972431. The next prime is 1271972477. The reversal of 1271972472 is 2742791721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271972477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174273 + ... + 181424.

Almost surely, 2^1271972472 is an apocalyptic number.

1271972472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1271972472 is an abundant number, since it is smaller than the sum of its proper divisors (1929309528).

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

1271972472 is a wasteful number, since it uses less digits than its factorization.

1271972472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355855 (or 355851 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 1271972472 is about 35664.7230747696. The cubic root of 1271972472 is about 1083.4924867450.

The spelling of 1271972472 in words is "one billion, two hundred seventy-one million, nine hundred seventy-two thousand, four hundred seventy-two".