6520497 has 4 divisors (see below), whose sum is σ = 8694000. Its totient is φ = 4346996.

The previous prime is 6520487. The next prime is 6520499. The reversal of 6520497 is 7940256.

6520497 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6520497 - 2¹² = 6516401 is a prime.

It is a super-2 number, since 2×6520497² = 85033762254018, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6520499) 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, 1086747 + ... + 1086752.

It is an arithmetic number, because the mean of its divisors is an integer number (2173500).

Almost surely, 2^6520497 is an apocalyptic number.

It is an amenable number.

6520497 is a deficient number, since it is larger than the sum of its proper divisors (2173503).

6520497 is a wasteful number, since it uses less digits than its factorization.

6520497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173502.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 6520497 is about 2553.5263852171. The cubic root of 6520497 is about 186.8215193919.

The spelling of 6520497 in words is "six million, five hundred twenty thousand, four hundred ninety-seven".