1271617005 has 8 divisors (see below), whose sum is σ = 2034587232. Its totient is φ = 678195728.

The previous prime is 1271617001. The next prime is 1271617013. The reversal of 1271617005 is 5007161721.

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 1271617005 - 2² = 1271617001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271617001) 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, 42387219 + ... + 42387248.

It is an arithmetic number, because the mean of its divisors is an integer number (254323404).

Almost surely, 2^1271617005 is an apocalyptic number.

1271617005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1271617005 is a deficient number, since it is larger than the sum of its proper divisors (762970227).

1271617005 is an equidigital number, since it uses as much as digits as its factorization.

1271617005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84774475.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 1271617005 is about 35659.7392727429. The cubic root of 1271617005 is about 1083.3915459580.

Adding to 1271617005 its reverse (5007161721), we get a palindrome (6278778726).

The spelling of 1271617005 in words is "one billion, two hundred seventy-one million, six hundred seventeen thousand, five".