6434121271 has 4 divisors (see below), whose sum is σ = 6497825544. Its totient is φ = 6370417000.

The previous prime is 6434121263. The next prime is 6434121283. The reversal of 6434121271 is 1721214346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1721214346 = 2 ⋅860607173.

It is a cyclic number.

It is not a de Polignac number, because 6434121271 - 2³ = 6434121263 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6434121241) 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 3 ways as a sum of consecutive naturals, for example, 31851985 + ... + 31852186.

It is an arithmetic number, because the mean of its divisors is an integer number (1624456386).

Almost surely, 2^6434121271 is an apocalyptic number.

6434121271 is a deficient number, since it is larger than the sum of its proper divisors (63704273).

6434121271 is a wasteful number, since it uses less digits than its factorization.

6434121271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63704272.

The product of its digits is 8064, while the sum is 31.

The square root of 6434121271 is about 80212.9744555081. The cubic root of 6434121271 is about 1859.9292059809.

The spelling of 6434121271 in words is "six billion, four hundred thirty-four million, one hundred twenty-one thousand, two hundred seventy-one".