127872229 has 4 divisors (see below), whose sum is σ = 128001484. Its totient is φ = 127742976.

The previous prime is 127872221. The next prime is 127872253. The reversal of 127872229 is 922278721.

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 116683204 + 11189025 = 10802^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 127872229 - 2³ = 127872221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127872191 and 127872200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127872221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63132 + ... + 65125.

It is an arithmetic number, because the mean of its divisors is an integer number (32000371).

Almost surely, 2^127872229 is an apocalyptic number.

It is an amenable number.

127872229 is a deficient number, since it is larger than the sum of its proper divisors (129255).

127872229 is an equidigital number, since it uses as much as digits as its factorization.

127872229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129254.

The product of its digits is 56448, while the sum is 40.

The square root of 127872229 is about 11308.0603553395. The cubic root of 127872229 is about 503.8006752010.

It can be divided in two parts, 127 and 872229, that added together give a square (872356 = 934²).

The spelling of 127872229 in words is "one hundred twenty-seven million, eight hundred seventy-two thousand, two hundred twenty-nine".