1005603 has 8 divisors (see below), whose sum is σ = 1361088. Its totient is φ = 660264.

The previous prime is 1005593. The next prime is 1005617. The reversal of 1005603 is 3065001.

1005603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1005603 - 2¹⁶ = 940067 is a prime.

It is a super-2 number, since 2×1005603² = 2022474787218, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1005643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (170136).

2^1005603 is an apocalyptic number.

1005603 is a deficient number, since it is larger than the sum of its proper divisors (355485).

1005603 is an equidigital number, since it uses as much as digits as its factorization.

1005603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1005603 is about 1002.7975867542. The cubic root of 1005603 is about 100.1864189305.

The spelling of 1005603 in words is "one million, five thousand, six hundred three".