1271956497 has 8 divisors (see below), whose sum is σ = 1938219456. Its totient is φ = 726832272.

The previous prime is 1271956481. The next prime is 1271956513. The reversal of 1271956497 is 7946591721.

It is an interprime number because it is at equal distance from previous prime (1271956481) and next prime (1271956513).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1271956497 - 2⁴ = 1271956481 is a prime.

It is a super-2 number, since 2×1271956497² = 3235746660521022018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1271956447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30284658 + ... + 30284699.

It is an arithmetic number, because the mean of its divisors is an integer number (242277432).

Almost surely, 2^1271956497 is an apocalyptic number.

It is an amenable number.

1271956497 is a deficient number, since it is larger than the sum of its proper divisors (666262959).

1271956497 is an equidigital number, since it uses as much as digits as its factorization.

1271956497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60569367.

The product of its digits is 952560, while the sum is 51.

The square root of 1271956497 is about 35664.4991132639. The cubic root of 1271956497 is about 1083.4879507808.

The spelling of 1271956497 in words is "one billion, two hundred seventy-one million, nine hundred fifty-six thousand, four hundred ninety-seven".