127256369 has 2 divisors, whose sum is σ = 127256370. Its totient is φ = 127256368.

The previous prime is 127256359. The next prime is 127256387. The reversal of 127256369 is 963652721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84419344 + 42837025 = 9188^2 + 6545^2 .

It is an emirp because it is prime and its reverse (963652721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127256369 - 2¹² = 127252273 is a prime.

It is a super-2 number, since 2×127256369² = 32388366902128322, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (127256329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63628184 + 63628185.

It is an arithmetic number, because the mean of its divisors is an integer number (63628185).

Almost surely, 2^127256369 is an apocalyptic number.

It is an amenable number.

127256369 is a deficient number, since it is larger than the sum of its proper divisors (1).

127256369 is an equidigital number, since it uses as much as digits as its factorization.

127256369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 127256369 is about 11280.7964701080. The cubic root of 127256369 is about 502.9905693286.

The spelling of 127256369 in words is "one hundred twenty-seven million, two hundred fifty-six thousand, three hundred sixty-nine".