127408321 has 4 divisors (see below), whose sum is σ = 129497044. Its totient is φ = 125319600.

The previous prime is 127408301. The next prime is 127408327. The reversal of 127408321 is 123804721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49280400 + 78127921 = 7020^2 + 8839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127408321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127408321.

It is not an unprimeable number, because it can be changed into a prime (127408327) 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 in 3 ways as a sum of consecutive naturals, for example, 1044270 + ... + 1044391.

It is an arithmetic number, because the mean of its divisors is an integer number (32374261).

Almost surely, 2^127408321 is an apocalyptic number.

It is an amenable number.

127408321 is a deficient number, since it is larger than the sum of its proper divisors (2088723).

127408321 is an equidigital number, since it uses as much as digits as its factorization.

127408321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088722.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 127408321 is about 11287.5294462517. The cubic root of 127408321 is about 503.1906903464.

The spelling of 127408321 in words is "one hundred twenty-seven million, four hundred eight thousand, three hundred twenty-one".