2506603 has 4 divisors (see below), whose sum is σ = 2734488. Its totient is φ = 2278720.

The previous prime is 2506583. The next prime is 2506619. The reversal of 2506603 is 3066052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2506603 - 2⁵ = 2506571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2506643) 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, 113926 + ... + 113947.

It is an arithmetic number, because the mean of its divisors is an integer number (683622).

2^2506603 is an apocalyptic number.

2506603 is a deficient number, since it is larger than the sum of its proper divisors (227885).

2506603 is a wasteful number, since it uses less digits than its factorization.

2506603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227884.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 2506603 is about 1583.2255051003. The cubic root of 2506603 is about 135.8402644495.

It can be divided in two parts, 2 and 506603, that added together give a palindrome (506605).

The spelling of 2506603 in words is "two million, five hundred six thousand, six hundred three".