2556803 has 2 divisors, whose sum is σ = 2556804. Its totient is φ = 2556802.

The previous prime is 2556793. The next prime is 2556821. The reversal of 2556803 is 3086552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2556803 - 2⁶ = 2556739 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2556403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278401 + 1278402.

It is an arithmetic number, because the mean of its divisors is an integer number (1278402).

2^2556803 is an apocalyptic number.

2556803 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556803 is an equidigital number, since it uses as much as digits as its factorization.

2556803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2556803 is about 1599.0006253907. Note that the first 3 decimals coincide. The cubic root of 2556803 is about 136.7411062510.

The spelling of 2556803 in words is "two million, five hundred fifty-six thousand, eight hundred three".