127012901 has 2 divisors, whose sum is σ = 127012902. Its totient is φ = 127012900.

The previous prime is 127012883. The next prime is 127012903. The reversal of 127012901 is 109210721.

It is a Cunningham number, because it is equal to 11270²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127012900 + 1 = 11270^2 + 1^2 .

It is an emirp because it is prime and its reverse (109210721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127012901 - 2¹⁰ = 127011877 is a prime.

It is a super-2 number, since 2×127012901² = 32264554040871602, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 127012903, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is equal to p_7218140 and since 127012901 and 7218140 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127012903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63506450 + 63506451.

It is an arithmetic number, because the mean of its divisors is an integer number (63506451).

Almost surely, 2^127012901 is an apocalyptic number.

It is an amenable number.

127012901 is a deficient number, since it is larger than the sum of its proper divisors (1).

127012901 is an equidigital number, since it uses as much as digits as its factorization.

127012901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 127012901 is about 11270.0000443656. Note that the first 4 decimals coincide. The cubic root of 127012901 is about 502.6695892196.

The spelling of 127012901 in words is "one hundred twenty-seven million, twelve thousand, nine hundred one".