2172603 has 18 divisors (see below), whose sum is σ = 3112284. Its totient is φ = 1347984.

The previous prime is 2172587. The next prime is 2172613. The reversal of 2172603 is 3062712.

It is a happy number.

2172603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2172603 - 2⁴ = 2172587 is a prime.

It is an Ulam number.

2172603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172603.

It is not an unprimeable number, because it can be changed into a prime (2172613) 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 17 ways as a sum of consecutive naturals, for example, 58701 + ... + 58737.

2^2172603 is an apocalyptic number.

2172603 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2172603 is a deficient number, since it is larger than the sum of its proper divisors (939681).

2172603 is an equidigital number, since it uses as much as digits as its factorization.

2172603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2172603 is about 1473.9752372411. The cubic root of 2172603 is about 129.5170045698.

It can be divided in two parts, 2172 and 603, that added together give a triangular number (2775 = T₇₄).

The spelling of 2172603 in words is "two million, one hundred seventy-two thousand, six hundred three".