127279249 has 2 divisors, whose sum is σ = 127279250. Its totient is φ = 127279248.

The previous prime is 127279247. The next prime is 127279261. The reversal of 127279249 is 942972721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84768849 + 42510400 = 9207^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 127279249 - 2¹ = 127279247 is a prime.

Together with 127279247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (127279241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63639624 + 63639625.

It is an arithmetic number, because the mean of its divisors is an integer number (63639625).

Almost surely, 2^127279249 is an apocalyptic number.

It is an amenable number.

127279249 is a deficient number, since it is larger than the sum of its proper divisors (1).

127279249 is an equidigital number, since it uses as much as digits as its factorization.

127279249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 127279249 is about 11281.8105373207. The cubic root of 127279249 is about 503.0207125077.

The spelling of 127279249 in words is "one hundred twenty-seven million, two hundred seventy-nine thousand, two hundred forty-nine".