127416521 has 2 divisors, whose sum is σ = 127416522. Its totient is φ = 127416520.

The previous prime is 127416511. The next prime is 127416559. The reversal of 127416521 is 125614721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73188025 + 54228496 = 8555^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 127416521 - 2¹⁴ = 127400137 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (127416511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63708260 + 63708261.

It is an arithmetic number, because the mean of its divisors is an integer number (63708261).

Almost surely, 2^127416521 is an apocalyptic number.

It is an amenable number.

127416521 is a deficient number, since it is larger than the sum of its proper divisors (1).

127416521 is an equidigital number, since it uses as much as digits as its factorization.

127416521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 127416521 is about 11287.8926731255. The cubic root of 127416521 is about 503.2014852331.

The spelling of 127416521 in words is "one hundred twenty-seven million, four hundred sixteen thousand, five hundred twenty-one".