6340561 has 4 divisors (see below), whose sum is σ = 6427492. Its totient is φ = 6253632.

The previous prime is 6340519. The next prime is 6340567. The reversal of 6340561 is 1650436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2954961 + 3385600 = 1719^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6340561 - 2¹¹ = 6338513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6340567) 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, 43356 + ... + 43501.

It is an arithmetic number, because the mean of its divisors is an integer number (1606873).

Almost surely, 2^6340561 is an apocalyptic number.

It is an amenable number.

6340561 is a deficient number, since it is larger than the sum of its proper divisors (86931).

6340561 is an equidigital number, since it uses as much as digits as its factorization.

6340561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86930.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6340561 is about 2518.0470607199. The cubic root of 6340561 is about 185.0869909853.

Adding to 6340561 its reverse (1650436), we get a palindrome (7990997).

The spelling of 6340561 in words is "six million, three hundred forty thousand, five hundred sixty-one".