5997561 has 4 divisors (see below), whose sum is σ = 7996752. Its totient is φ = 3998372.

The previous prime is 5997553. The next prime is 5997571. The reversal of 5997561 is 1657995.

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.

It is a cyclic number.

It is not a de Polignac number, because 5997561 - 2³ = 5997553 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (5997571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999591 + ... + 999596.

It is an arithmetic number, because the mean of its divisors is an integer number (1999188).

Almost surely, 2^5997561 is an apocalyptic number.

It is an amenable number.

5997561 is a deficient number, since it is larger than the sum of its proper divisors (1999191).

5997561 is a wasteful number, since it uses less digits than its factorization.

5997561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999190.

The product of its digits is 85050, while the sum is 42.

The square root of 5997561 is about 2448.9918333878. The cubic root of 5997561 is about 181.6874339621.

The spelling of 5997561 in words is "five million, nine hundred ninety-seven thousand, five hundred sixty-one".