1353603 has 4 divisors (see below), whose sum is σ = 1804808. Its totient is φ = 902400.

The previous prime is 1353593. The next prime is 1353607. The reversal of 1353603 is 3063531.

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

It is not a de Polignac number, because 1353603 - 2⁹ = 1353091 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1353603.

It is not an unprimeable number, because it can be changed into a prime (1353607) 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, 225598 + ... + 225603.

It is an arithmetic number, because the mean of its divisors is an integer number (451202).

2^1353603 is an apocalyptic number.

1353603 is a deficient number, since it is larger than the sum of its proper divisors (451205).

1353603 is an equidigital number, since it uses as much as digits as its factorization.

1353603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451204.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 1353603 is about 1163.4444550558. Note that the first 4 decimals coincide. The cubic root of 1353603 is about 110.6191803252.

The spelling of 1353603 in words is "one million, three hundred fifty-three thousand, six hundred three".