1353403 has 4 divisors (see below), whose sum is σ = 1356088. Its totient is φ = 1350720.

The previous prime is 1353397. The next prime is 1353433. The reversal of 1353403 is 3043531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3043531 = 367 ⋅8293.

It is a cyclic number.

It is not a de Polignac number, because 1353403 - 2⁵ = 1353371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1353433) 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, 333 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (339022).

2^1353403 is an apocalyptic number.

1353403 is a deficient number, since it is larger than the sum of its proper divisors (2685).

1353403 is an equidigital number, since it uses as much as digits as its factorization.

1353403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 1353403 is about 1163.3585002053. The cubic root of 1353403 is about 110.6137319218.

Adding to 1353403 its reverse (3043531), we get a palindrome (4396934).

The spelling of 1353403 in words is "one million, three hundred fifty-three thousand, four hundred three".