127645513 has 2 divisors, whose sum is σ = 127645514. Its totient is φ = 127645512.

The previous prime is 127645487. The next prime is 127645549. The reversal of 127645513 is 315546721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76265289 + 51380224 = 8733^2 + 7168^2 .

It is a cyclic number.

It is not a de Polignac number, because 127645513 - 2⁵ = 127645481 is a prime.

It is not a weakly prime, because it can be changed into another prime (127645613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63822756 + 63822757.

It is an arithmetic number, because the mean of its divisors is an integer number (63822757).

Almost surely, 2^127645513 is an apocalyptic number.

It is an amenable number.

127645513 is a deficient number, since it is larger than the sum of its proper divisors (1).

127645513 is an equidigital number, since it uses as much as digits as its factorization.

127645513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 127645513 is about 11298.0313771913. The cubic root of 127645513 is about 503.5027547828.

The spelling of 127645513 in words is "one hundred twenty-seven million, six hundred forty-five thousand, five hundred thirteen".