1271492941721 has 8 divisors (see below), whose sum is σ = 1276865087904. Its totient is φ = 1266124088320.

The previous prime is 1271492941687. The next prime is 1271492941777.

1271492941721 is nontrivially palindromic in base 10.

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 1271492941721 - 2⁶ = 1271492941657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1271492941721.

It is not an unprimeable number, because it can be changed into a prime (1271492541721) 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, 47735 + ... + 1595388.

It is an arithmetic number, because the mean of its divisors is an integer number (159608135988).

Almost surely, 2^{1271492941721} is an apocalyptic number.

It is an amenable number.

1271492941721 is a deficient number, since it is larger than the sum of its proper divisors (5372146183).

1271492941721 is a wasteful number, since it uses less digits than its factorization.

1271492941721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646391.

The product of its digits is 508032, while the sum is 50.

The spelling of 1271492941721 in words is "one trillion, two hundred seventy-one billion, four hundred ninety-two million, nine hundred forty-one thousand, seven hundred twenty-one".