1056603 has 4 divisors (see below), whose sum is σ = 1408808. Its totient is φ = 704400.

The previous prime is 1056599. The next prime is 1056613. The reversal of 1056603 is 3066501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3066501 = 3 ⋅1022167.

It is not a de Polignac number, because 1056603 - 2² = 1056599 is a prime.

It is a super-2 number, since 2×1056603² = 2232819799218, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1056603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056603.

It is not an unprimeable number, because it can be changed into a prime (1056613) 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, 176098 + ... + 176103.

It is an arithmetic number, because the mean of its divisors is an integer number (352202).

2^1056603 is an apocalyptic number.

1056603 is a deficient number, since it is larger than the sum of its proper divisors (352205).

1056603 is an equidigital number, since it uses as much as digits as its factorization.

1056603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352204.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1056603 is about 1027.9119612107. The cubic root of 1056603 is about 101.8522466655.

The spelling of 1056603 in words is "one million, fifty-six thousand, six hundred three".