127315261 has 8 divisors (see below), whose sum is σ = 138448440. Its totient is φ = 116587008.

The previous prime is 127315259. The next prime is 127315271. The reversal of 127315261 is 162513721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52838361 + 74476900 = 7269^2 + 8630^2 .

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 127315261 - 2¹ = 127315259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127315231) 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 7 ways as a sum of consecutive naturals, for example, 100576 + ... + 101833.

It is an arithmetic number, because the mean of its divisors is an integer number (17306055).

Almost surely, 2^127315261 is an apocalyptic number.

It is an amenable number.

127315261 is a deficient number, since it is larger than the sum of its proper divisors (11133179).

127315261 is a wasteful number, since it uses less digits than its factorization.

127315261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202463.

The product of its digits is 2520, while the sum is 28.

The square root of 127315261 is about 11283.4064448641. The cubic root of 127315261 is about 503.0681490796.

Adding to 127315261 its reverse (162513721), we get a palindrome (289828982).

The spelling of 127315261 in words is "one hundred twenty-seven million, three hundred fifteen thousand, two hundred sixty-one".