1271493679 has 8 divisors (see below), whose sum is σ = 1299133440. Its totient is φ = 1243878456.

The previous prime is 1271493673. The next prime is 1271493701. The reversal of 1271493679 is 9763941721.

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

It is a cyclic number.

It is not a de Polignac number, because 1271493679 - 2²⁹ = 734622767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271493673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131782 + ... + 141100.

It is an arithmetic number, because the mean of its divisors is an integer number (162391680).

Almost surely, 2^1271493679 is an apocalyptic number.

1271493679 is a deficient number, since it is larger than the sum of its proper divisors (27639761).

1271493679 is an equidigital number, since it uses as much as digits as its factorization.

1271493679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12269.

The product of its digits is 571536, while the sum is 49.

The square root of 1271493679 is about 35658.0100257993. The cubic root of 1271493679 is about 1083.3565210869.

The spelling of 1271493679 in words is "one billion, two hundred seventy-one million, four hundred ninety-three thousand, six hundred seventy-nine".