1227161671 has 2 divisors, whose sum is σ = 1227161672. Its totient is φ = 1227161670.

The previous prime is 1227161669. The next prime is 1227161687. The reversal of 1227161671 is 1761617221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1227161671 - 2¹ = 1227161669 is a prime.

Together with 1227161669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227164671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613580835 + 613580836.

It is an arithmetic number, because the mean of its divisors is an integer number (613580836).

Almost surely, 2^1227161671 is an apocalyptic number.

1227161671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227161671 is an equidigital number, since it uses as much as digits as its factorization.

1227161671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 1227161671 is about 35030.8674029063. The cubic root of 1227161671 is about 1070.6164878394.

Adding to 1227161671 its reverse (1761617221), we get a palindrome (2988778892).

The spelling of 1227161671 in words is "one billion, two hundred twenty-seven million, one hundred sixty-one thousand, six hundred seventy-one".