127240457 has 2 divisors, whose sum is σ = 127240458. Its totient is φ = 127240456.

The previous prime is 127240433. The next prime is 127240469. The reversal of 127240457 is 754042721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 430336 = 11261^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 127240457 - 2¹⁰ = 127239433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127240417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63620228 + 63620229.

It is an arithmetic number, because the mean of its divisors is an integer number (63620229).

Almost surely, 2^127240457 is an apocalyptic number.

It is an amenable number.

127240457 is a deficient number, since it is larger than the sum of its proper divisors (1).

127240457 is an equidigital number, since it uses as much as digits as its factorization.

127240457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 127240457 is about 11280.0911787095. The cubic root of 127240457 is about 502.9696039875.

The spelling of 127240457 in words is "one hundred twenty-seven million, two hundred forty thousand, four hundred fifty-seven".