127159961 has 2 divisors, whose sum is σ = 127159962. Its totient is φ = 127159960.

The previous prime is 127159937. The next prime is 127159993. The reversal of 127159961 is 169951721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106729561 + 20430400 = 10331^2 + 4520^2 .

It is an emirp because it is prime and its reverse (169951721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127159961 - 2¹⁸ = 126897817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127159061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63579980 + 63579981.

It is an arithmetic number, because the mean of its divisors is an integer number (63579981).

Almost surely, 2^127159961 is an apocalyptic number.

It is an amenable number.

127159961 is a deficient number, since it is larger than the sum of its proper divisors (1).

127159961 is an equidigital number, since it uses as much as digits as its factorization.

127159961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 41.

The square root of 127159961 is about 11276.5225579520. The cubic root of 127159961 is about 502.8635172314.

The spelling of 127159961 in words is "one hundred twenty-seven million, one hundred fifty-nine thousand, nine hundred sixty-one".