6423561 has 12 divisors (see below), whose sum is σ = 9301188. Its totient is φ = 4271904.

The previous prime is 6423559. The next prime is 6423581. The reversal of 6423561 is 1653246.

It can be written as a sum of positive squares in 2 ways, for example, as 4410000 + 2013561 = 2100^2 + 1419^2 .

It is not a de Polignac number, because 6423561 - 2¹ = 6423559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6423551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5331 + ... + 6423.

It is an arithmetic number, because the mean of its divisors is an integer number (775099).

Almost surely, 2^6423561 is an apocalyptic number.

It is an amenable number.

6423561 is a deficient number, since it is larger than the sum of its proper divisors (2877627).

6423561 is a wasteful number, since it uses less digits than its factorization.

6423561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 1749 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 6423561 is about 2534.4745017459. The cubic root of 6423561 is about 185.8911086533.

The spelling of 6423561 in words is "six million, four hundred twenty-three thousand, five hundred sixty-one".