6471220 has 48 divisors (see below), whose sum is σ = 16450560. Its totient is φ = 2087424.

The previous prime is 6471193. The next prime is 6471233. The reversal of 6471220 is 221746.

It is a junction number, because it is equal to n+sod(n) for n = 6471191 and 6471200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021 + ... + 3739.

It is an arithmetic number, because the mean of its divisors is an integer number (342720).

Almost surely, 2^6471220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6471220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8225280).

6471220 is an abundant number, since it is smaller than the sum of its proper divisors (9979340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6471220 is a wasteful number, since it uses less digits than its factorization.

6471220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6471220 is about 2543.8592728372. The cubic root of 6471220 is about 186.3497101342.

Adding to 6471220 its reverse (221746), we get a palindrome (6692966).

The spelling of 6471220 in words is "six million, four hundred seventy-one thousand, two hundred twenty".