1355403 has 32 divisors (see below), whose sum is σ = 2252800. Its totient is φ = 707616.

The previous prime is 1355401. The next prime is 1355423. The reversal of 1355403 is 3045531.

It is not a de Polignac number, because 1355403 - 2¹ = 1355401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

1355403 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1355403.

It is not an unprimeable number, because it can be changed into a prime (1355401) 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 31 ways as a sum of consecutive naturals, for example, 17118 + ... + 17196.

It is an arithmetic number, because the mean of its divisors is an integer number (70400).

2^1355403 is an apocalyptic number.

1355403 is a deficient number, since it is larger than the sum of its proper divisors (897397).

1355403 is a wasteful number, since it uses less digits than its factorization.

1355403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 1355403 is about 1164.2177631354. The cubic root of 1355403 is about 110.6681918227.

The spelling of 1355403 in words is "one million, three hundred fifty-five thousand, four hundred three".