5561603 has 4 divisors (see below), whose sum is σ = 5644680. Its totient is φ = 5478528.

The previous prime is 5561599. The next prime is 5561627. The reversal of 5561603 is 3061655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3061655 = 5 ⋅612331.

It is a cyclic number.

It is not a de Polignac number, because 5561603 - 2² = 5561599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5561693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41438 + ... + 41571.

It is an arithmetic number, because the mean of its divisors is an integer number (1411170).

Almost surely, 2^5561603 is an apocalyptic number.

5561603 is a deficient number, since it is larger than the sum of its proper divisors (83077).

5561603 is an equidigital number, since it uses as much as digits as its factorization.

5561603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83076.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 5561603 is about 2358.3051117275. The cubic root of 5561603 is about 177.1740019133.

The spelling of 5561603 in words is "five million, five hundred sixty-one thousand, six hundred three".