1271472687 has 16 divisors (see below), whose sum is σ = 1994467680. Its totient is φ = 797786496.

The previous prime is 1271472649. The next prime is 1271472731. The reversal of 1271472687 is 7862741721.

It is not a de Polignac number, because 1271472687 - 2¹⁵ = 1271439919 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271472287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384588 + ... + 1385505.

It is an arithmetic number, because the mean of its divisors is an integer number (124654230).

Almost surely, 2^1271472687 is an apocalyptic number.

1271472687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1271472687 is a deficient number, since it is larger than the sum of its proper divisors (722994993).

1271472687 is a wasteful number, since it uses less digits than its factorization.

1271472687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770119 (or 2770113 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 1271472687 is about 35657.7156727685. The cubic root of 1271472687 is about 1083.3505590844.

The spelling of 1271472687 in words is "one billion, two hundred seventy-one million, four hundred seventy-two thousand, six hundred eighty-seven".