127770361 has 8 divisors (see below), whose sum is σ = 131988744. Its totient is φ = 123592320.

The previous prime is 127770347. The next prime is 127770371. The reversal of 127770361 is 163077721.

It can be written as a sum of positive squares in 4 ways, for example, as 103327225 + 24443136 = 10165^2 + 4944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127770361 - 2⁷ = 127770233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127770301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3580 + ... + 16381.

It is an arithmetic number, because the mean of its divisors is an integer number (16498593).

Almost surely, 2^127770361 is an apocalyptic number.

It is an amenable number.

127770361 is a deficient number, since it is larger than the sum of its proper divisors (4218383).

127770361 is a wasteful number, since it uses less digits than its factorization.

127770361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 127770361 is about 11303.5552371809. Note that the first 3 decimals coincide. The cubic root of 127770361 is about 503.6668572439. Note that the first 3 decimals are identical.

The spelling of 127770361 in words is "one hundred twenty-seven million, seven hundred seventy thousand, three hundred sixty-one".