6445271 has 4 divisors (see below), whose sum is σ = 7366032. Its totient is φ = 5524512.

The previous prime is 6445259. The next prime is 6445319. The reversal of 6445271 is 1725446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6445271 - 2¹⁸ = 6183127 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 (6445871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460370 + ... + 460383.

It is an arithmetic number, because the mean of its divisors is an integer number (1841508).

Almost surely, 2^6445271 is an apocalyptic number.

6445271 is a deficient number, since it is larger than the sum of its proper divisors (920761).

6445271 is an equidigital number, since it uses as much as digits as its factorization.

6445271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920760.

The product of its digits is 6720, while the sum is 29.

The square root of 6445271 is about 2538.7538281606. The cubic root of 6445271 is about 186.1002946974.

The spelling of 6445271 in words is "six million, four hundred forty-five thousand, two hundred seventy-one".