1158403 has 4 divisors (see below), whose sum is σ = 1160568. Its totient is φ = 1156240.

The previous prime is 1158401. The next prime is 1158407. The reversal of 1158403 is 3048511.

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 1158403 - 2¹ = 1158401 is a prime.

It is an Ulam number.

It is a Duffinian number.

1158403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1158401) 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, 375 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (290142).

2^1158403 is an apocalyptic number.

1158403 is a deficient number, since it is larger than the sum of its proper divisors (2165).

1158403 is an equidigital number, since it uses as much as digits as its factorization.

1158403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1158403 is about 1076.2913174415. The cubic root of 1158403 is about 105.0235170303.

It can be divided in two parts, 1 and 158403, that added together give a square (158404 = 398²).

The spelling of 1158403 in words is "one million, one hundred fifty-eight thousand, four hundred three".