2557673 has 2 divisors, whose sum is σ = 2557674. Its totient is φ = 2557672.

The previous prime is 2557663. The next prime is 2557691. The reversal of 2557673 is 3767552.

Added to its reverse (3767552) it gives a square (6325225 = 2515²).

2557673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2319529 + 238144 = 1523^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557673 - 2⁸ = 2557417 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2557603) 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 as a sum of consecutive naturals, namely, 1278836 + 1278837.

It is an arithmetic number, because the mean of its divisors is an integer number (1278837).

2^2557673 is an apocalyptic number.

It is an amenable number.

2557673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557673 is an equidigital number, since it uses as much as digits as its factorization.

2557673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44100, while the sum is 35.

The square root of 2557673 is about 1599.2726471743. The cubic root of 2557673 is about 136.7566140645.

Adding to 2557673 its reverse (3767552), we get a square (6325225 = 2515²).

The spelling of 2557673 in words is "two million, five hundred fifty-seven thousand, six hundred seventy-three".