6520413 has 8 divisors (see below), whose sum is σ = 8718688. Its totient is φ = 4334544.

The previous prime is 6520411. The next prime is 6520417. The reversal of 6520413 is 3140256.

It is a happy number.

6520413 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6520413 - 2¹ = 6520411 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6520413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795 + ... + 4032.

It is an arithmetic number, because the mean of its divisors is an integer number (1089836).

Almost surely, 2^6520413 is an apocalyptic number.

It is an amenable number.

6520413 is a deficient number, since it is larger than the sum of its proper divisors (2198275).

6520413 is a wasteful number, since it uses less digits than its factorization.

6520413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6203.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6520413 is about 2553.5099373216. The cubic root of 6520413 is about 186.8207171486.

Adding to 6520413 its reverse (3140256), we get a palindrome (9660669).

The spelling of 6520413 in words is "six million, five hundred twenty thousand, four hundred thirteen".