6001561 has 8 divisors (see below), whose sum is σ = 6475464. Its totient is φ = 5541120.

The previous prime is 6001547. The next prime is 6001577. The reversal of 6001561 is 1651006.

6001561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3825936 + 2175625 = 1956^2 + 1475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6001561 - 2⁷ = 6001433 is a prime.

It is a Duffinian number.

6001561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6001531) 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 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (809433).

Almost surely, 2^6001561 is an apocalyptic number.

It is an amenable number.

6001561 is a deficient number, since it is larger than the sum of its proper divisors (473903).

6001561 is a wasteful number, since it uses less digits than its factorization.

6001561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 6001561 is about 2449.8083598518. The cubic root of 6001561 is about 181.7278163904.

Adding to 6001561 its reverse (1651006), we get a palindrome (7652567).

The spelling of 6001561 in words is "six million, one thousand, five hundred sixty-one".