127500421 has 4 divisors (see below), whose sum is σ = 128933100. Its totient is φ = 126067744.

The previous prime is 127500383. The next prime is 127500437. The reversal of 127500421 is 124005721.

It is a happy number.

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 46049796 + 81450625 = 6786^2 + 9025^2 .

It is a cyclic number.

It is not a de Polignac number, because 127500421 - 2⁹ = 127499909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127500392 and 127500401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127500521) 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, 716206 + ... + 716383.

It is an arithmetic number, because the mean of its divisors is an integer number (32233275).

Almost surely, 2^127500421 is an apocalyptic number.

It is an amenable number.

127500421 is a deficient number, since it is larger than the sum of its proper divisors (1432679).

127500421 is an equidigital number, since it uses as much as digits as its factorization.

127500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432678.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 127500421 is about 11291.6084328142. The cubic root of 127500421 is about 503.3119087509.

The spelling of 127500421 in words is "one hundred twenty-seven million, five hundred thousand, four hundred twenty-one".