855403 has 8 divisors (see below), whose sum is σ = 895280. Its totient is φ = 816480.

The previous prime is 855401. The next prime is 855419. The reversal of 855403 is 304558.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855403 - 2¹ = 855401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855401) 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 7 ways as a sum of consecutive naturals, for example, 2068 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (111910).

2⁸⁵⁵⁴⁰³ is an apocalyptic number.

855403 is a deficient number, since it is larger than the sum of its proper divisors (39877).

855403 is a wasteful number, since it uses less digits than its factorization.

855403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 855403 is about 924.8799922152. The cubic root of 855403 is about 94.9271093691.

The spelling of 855403 in words is "eight hundred fifty-five thousand, four hundred three".