127557361 has 2 divisors, whose sum is σ = 127557362. Its totient is φ = 127557360.

The previous prime is 127557349. The next prime is 127557371. The reversal of 127557361 is 163755721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68574961 + 58982400 = 8281^2 + 7680^2 .

It is a cyclic number.

It is not a de Polignac number, because 127557361 - 2⁵ = 127557329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127557361.

It is not a weakly prime, because it can be changed into another prime (127557301) 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, 63778680 + 63778681.

It is an arithmetic number, because the mean of its divisors is an integer number (63778681).

Almost surely, 2^127557361 is an apocalyptic number.

It is an amenable number.

127557361 is a deficient number, since it is larger than the sum of its proper divisors (1).

127557361 is an equidigital number, since it uses as much as digits as its factorization.

127557361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44100, while the sum is 37.

The square root of 127557361 is about 11294.1294927940. The cubic root of 127557361 is about 503.3868217453.

The spelling of 127557361 in words is "one hundred twenty-seven million, five hundred fifty-seven thousand, three hundred sixty-one".