1356403 has 4 divisors (see below), whose sum is σ = 1389528. Its totient is φ = 1323280.

The previous prime is 1356401. The next prime is 1356409. The reversal of 1356403 is 3046531.

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

It is a cyclic number.

It is not a de Polignac number, because 1356403 - 2¹ = 1356401 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356401) 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, 16501 + ... + 16582.

It is an arithmetic number, because the mean of its divisors is an integer number (347382).

2^1356403 is an apocalyptic number.

1356403 is a deficient number, since it is larger than the sum of its proper divisors (33125).

1356403 is an equidigital number, since it uses as much as digits as its factorization.

1356403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33124.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1356403 is about 1164.6471568677. The cubic root of 1356403 is about 110.6954016848.

The spelling of 1356403 in words is "one million, three hundred fifty-six thousand, four hundred three".