127540243 has 2 divisors, whose sum is σ = 127540244. Its totient is φ = 127540242.

The previous prime is 127540229. The next prime is 127540249. The reversal of 127540243 is 342045721.

It is a strong prime.

It is an emirp because it is prime and its reverse (342045721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127540243 is a prime.

It is not a weakly prime, because it can be changed into another prime (127540249) 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, 63770121 + 63770122.

It is an arithmetic number, because the mean of its divisors is an integer number (63770122).

Almost surely, 2^127540243 is an apocalyptic number.

127540243 is a deficient number, since it is larger than the sum of its proper divisors (1).

127540243 is an equidigital number, since it uses as much as digits as its factorization.

127540243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 127540243 is about 11293.3716400374. The cubic root of 127540243 is about 503.3643028277.

Adding to 127540243 its reverse (342045721), we get a palindrome (469585964).

The spelling of 127540243 in words is "one hundred twenty-seven million, five hundred forty thousand, two hundred forty-three".