127731061 has 2 divisors, whose sum is σ = 127731062. Its totient is φ = 127731060.

The previous prime is 127731049. The next prime is 127731077. The reversal of 127731061 is 160137721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126562500 + 1168561 = 11250^2 + 1081^2 .

It is an emirp because it is prime and its reverse (160137721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127731061 - 2¹¹ = 127729013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127731041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63865530 + 63865531.

It is an arithmetic number, because the mean of its divisors is an integer number (63865531).

Almost surely, 2^127731061 is an apocalyptic number.

It is an amenable number.

127731061 is a deficient number, since it is larger than the sum of its proper divisors (1).

127731061 is an equidigital number, since it uses as much as digits as its factorization.

127731061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 127731061 is about 11301.8167123697. The cubic root of 127731061 is about 503.6152121490.

Adding to 127731061 its reverse (160137721), we get a palindrome (287868782).

The spelling of 127731061 in words is "one hundred twenty-seven million, seven hundred thirty-one thousand, sixty-one".