127240657 has 2 divisors, whose sum is σ = 127240658. Its totient is φ = 127240656.

The previous prime is 127240649. The next prime is 127240667. The reversal of 127240657 is 756042721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96059601 + 31181056 = 9801^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 127240657 - 2³ = 127240649 is a prime.

It is not a weakly prime, because it can be changed into another prime (127240627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63620328 + 63620329.

It is an arithmetic number, because the mean of its divisors is an integer number (63620329).

Almost surely, 2^127240657 is an apocalyptic number.

It is an amenable number.

127240657 is a deficient number, since it is larger than the sum of its proper divisors (1).

127240657 is an equidigital number, since it uses as much as digits as its factorization.

127240657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 127240657 is about 11280.1000438826. The cubic root of 127240657 is about 502.9698675145.

The spelling of 127240657 in words is "one hundred twenty-seven million, two hundred forty thousand, six hundred fifty-seven".