2557003 has 4 divisors (see below), whose sum is σ = 2565640. Its totient is φ = 2548368.

The previous prime is 2556997. The next prime is 2557007. The reversal of 2557003 is 3007552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557003 is a prime.

It is a Duffinian number.

2557003 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2557007) 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, 3858 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (641410).

2^2557003 is an apocalyptic number.

2557003 is a deficient number, since it is larger than the sum of its proper divisors (8637).

2557003 is an equidigital number, since it uses as much as digits as its factorization.

2557003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 2557003 is about 1599.0631632303. The cubic root of 2557003 is about 136.7446715770.

The spelling of 2557003 in words is "two million, five hundred fifty-seven thousand, three".