6531020 has 24 divisors (see below), whose sum is σ = 13780368. Its totient is φ = 2600000.

The previous prime is 6530999. The next prime is 6531029. The reversal of 6531020 is 201356.

It is a self number, because there is not a number n which added to its sum of digits gives 6531020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4370 + ... + 5670.

It is an arithmetic number, because the mean of its divisors is an integer number (574182).

Almost surely, 2^6531020 is an apocalyptic number.

It is an amenable number.

6531020 is an abundant number, since it is smaller than the sum of its proper divisors (7249348).

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

6531020 is a wasteful number, since it uses less digits than its factorization.

6531020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 6531020 is about 2555.5860384655. The cubic root of 6531020 is about 186.9219650194.

Adding to 6531020 its reverse (201356), we get a palindrome (6732376).

The spelling of 6531020 in words is "six million, five hundred thirty-one thousand, twenty".