127248409 has 4 divisors (see below), whose sum is σ = 127420416. Its totient is φ = 127076404.

The previous prime is 127248391. The next prime is 127248413. The reversal of 127248409 is 904842721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127248409 - 2¹⁹ = 126724121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127248469) 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 in 3 ways as a sum of consecutive naturals, for example, 84889 + ... + 86374.

It is an arithmetic number, because the mean of its divisors is an integer number (31855104).

Almost surely, 2^127248409 is an apocalyptic number.

It is an amenable number.

127248409 is a deficient number, since it is larger than the sum of its proper divisors (172007).

127248409 is an equidigital number, since it uses as much as digits as its factorization.

127248409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172006.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 127248409 is about 11280.4436526229. The cubic root of 127248409 is about 502.9800816062.

The spelling of 127248409 in words is "one hundred twenty-seven million, two hundred forty-eight thousand, four hundred nine".