1271752221 has 8 divisors (see below), whose sum is σ = 1702765440. Its totient is φ = 844286912.

The previous prime is 1271752211. The next prime is 1271752241. The reversal of 1271752221 is 1222571721.

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 1271752221 - 2⁵ = 1271752189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271752211) 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, 886140 + ... + 887573.

It is an arithmetic number, because the mean of its divisors is an integer number (212845680).

Almost surely, 2^1271752221 is an apocalyptic number.

It is an amenable number.

1271752221 is a deficient number, since it is larger than the sum of its proper divisors (431013219).

1271752221 is a wasteful number, since it uses less digits than its factorization.

1271752221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773955.

The product of its digits is 3920, while the sum is 30.

The square root of 1271752221 is about 35661.6351419842. The cubic root of 1271752221 is about 1083.4299450144.

The spelling of 1271752221 in words is "one billion, two hundred seventy-one million, seven hundred fifty-two thousand, two hundred twenty-one".