1271167481 has 2 divisors, whose sum is σ = 1271167482. Its totient is φ = 1271167480.

The previous prime is 1271167459. The next prime is 1271167531. The reversal of 1271167481 is 1847611721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055665081 + 215502400 = 32491^2 + 14680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271167481 - 2²⁶ = 1204058617 is a prime.

It is a super-2 number, since 2×1271167481² = 3231733529503770722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1271167451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635583740 + 635583741.

It is an arithmetic number, because the mean of its divisors is an integer number (635583741).

Almost surely, 2^1271167481 is an apocalyptic number.

It is an amenable number.

1271167481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271167481 is an equidigital number, since it uses as much as digits as its factorization.

1271167481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 38.

The square root of 1271167481 is about 35653.4357530940. The cubic root of 1271167481 is about 1083.2638691765.

The spelling of 1271167481 in words is "one billion, two hundred seventy-one million, one hundred sixty-seven thousand, four hundred eighty-one".