1271667601 has 2 divisors, whose sum is σ = 1271667602. Its totient is φ = 1271667600.

The previous prime is 1271667583. The next prime is 1271667629. The reversal of 1271667601 is 1067661721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1198821376 + 72846225 = 34624^2 + 8535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271667601 - 2⁵ = 1271667569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1271667101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635833800 + 635833801.

It is an arithmetic number, because the mean of its divisors is an integer number (635833801).

Almost surely, 2^1271667601 is an apocalyptic number.

It is an amenable number.

1271667601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271667601 is an equidigital number, since it uses as much as digits as its factorization.

1271667601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1271667601 is about 35660.4486931951. The cubic root of 1271667601 is about 1083.4059146847.

The spelling of 1271667601 in words is "one billion, two hundred seventy-one million, six hundred sixty-seven thousand, six hundred one".