127478081 has 2 divisors, whose sum is σ = 127478082. Its totient is φ = 127478080.

The previous prime is 127478077. The next prime is 127478083. The reversal of 127478081 is 180874721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 46117681 = 9020^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 127478081 - 2² = 127478077 is a prime.

It is a super-2 number, since 2×127478081² = 32501322270885122, which contains 22 as substring.

Together with 127478083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127478083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63739040 + 63739041.

It is an arithmetic number, because the mean of its divisors is an integer number (63739041).

Almost surely, 2^127478081 is an apocalyptic number.

It is an amenable number.

127478081 is a deficient number, since it is larger than the sum of its proper divisors (1).

127478081 is an equidigital number, since it uses as much as digits as its factorization.

127478081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 127478081 is about 11290.6191592844. The cubic root of 127478081 is about 503.2825110838.

The spelling of 127478081 in words is "one hundred twenty-seven million, four hundred seventy-eight thousand, eighty-one".