4159561 has 16 divisors (see below), whose sum is σ = 4950400. Its totient is φ = 3492720.

The previous prime is 4159553. The next prime is 4159583. The reversal of 4159561 is 1659514.

It is not a de Polignac number, because 4159561 - 2³ = 4159553 is a prime.

It is the 2040-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (4159501) by changing a digit.

It is a nontrivial repunit in base 2039.

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 15 ways as a sum of consecutive naturals, for example, 22891 + ... + 23071.

It is an arithmetic number, because the mean of its divisors is an integer number (309400).

Almost surely, 2^4159561 is an apocalyptic number.

It is an amenable number.

4159561 is a deficient number, since it is larger than the sum of its proper divisors (790839).

4159561 is an equidigital number, since it uses as much as digits as its factorization.

4159561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 255 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 4159561 is about 2039.5001838686. The cubic root of 4159561 is about 160.8233727772.

The spelling of 4159561 in words is "four million, one hundred fifty-nine thousand, five hundred sixty-one".