6485561 has 4 divisors (see below), whose sum is σ = 6636432. Its totient is φ = 6334692.

The previous prime is 6485543. The next prime is 6485579. The reversal of 6485561 is 1655846.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1655846 = 2 ⋅827923.

It is an interprime number because it is at equal distance from previous prime (6485543) and next prime (6485579).

It is a cyclic number.

It is not a de Polignac number, because 6485561 - 2⁶ = 6485497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6485261) 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 3 ways as a sum of consecutive naturals, for example, 75371 + ... + 75456.

It is an arithmetic number, because the mean of its divisors is an integer number (1659108).

Almost surely, 2^6485561 is an apocalyptic number.

It is an amenable number.

6485561 is a deficient number, since it is larger than the sum of its proper divisors (150871).

6485561 is a wasteful number, since it uses less digits than its factorization.

6485561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150870.

The product of its digits is 28800, while the sum is 35.

The square root of 6485561 is about 2546.6764615867. The cubic root of 6485561 is about 186.4872663430.

The spelling of 6485561 in words is "six million, four hundred eighty-five thousand, five hundred sixty-one".