2555403 has 4 divisors (see below), whose sum is σ = 3407208. Its totient is φ = 1703600.

The previous prime is 2555363. The next prime is 2555429. The reversal of 2555403 is 3045552.

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 2555403 - 2⁹ = 2554891 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2555453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425898 + ... + 425903.

It is an arithmetic number, because the mean of its divisors is an integer number (851802).

2^2555403 is an apocalyptic number.

2555403 is a deficient number, since it is larger than the sum of its proper divisors (851805).

2555403 is an equidigital number, since it uses as much as digits as its factorization.

2555403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851804.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 2555403 is about 1598.5627920104. The cubic root of 2555403 is about 136.7161437620.

The spelling of 2555403 in words is "two million, five hundred fifty-five thousand, four hundred three".