6540469 has 10 divisors (see below), whose sum is σ = 7116430. Its totient is φ = 6010992.

The previous prime is 6540467. The next prime is 6540493. The reversal of 6540469 is 9640456.

It can be written as a sum of positive squares in 5 ways, for example, as 4100625 + 2439844 = 2025^2 + 1562^2 .

It is not a de Polignac number, because 6540469 - 2¹ = 6540467 is a prime.

It is a super-2 number, since 2×6540469² = 85555469479922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540467) 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 9 ways as a sum of consecutive naturals, for example, 28447 + ... + 28675.

It is an arithmetic number, because the mean of its divisors is an integer number (711643).

Almost surely, 2^6540469 is an apocalyptic number.

It is an amenable number.

6540469 is a deficient number, since it is larger than the sum of its proper divisors (575961).

6540469 is an frugal number, since it uses more digits than its factorization.

6540469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6540469 is about 2557.4340656212. The cubic root of 6540469 is about 187.0120670528.

The spelling of 6540469 in words is "six million, five hundred forty thousand, four hundred sixty-nine".