445557 has 16 divisors (see below), whose sum is σ = 694400. Its totient is φ = 254016.

The previous prime is 445541. The next prime is 445567. The reversal of 445557 is 755544.

It is not a de Polignac number, because 445557 - 2⁴ = 445541 is a prime.

It is the 668-th Hogben number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445507) by changing a digit.

It is a nontrivial repunit in base 667.

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 15 ways as a sum of consecutive naturals, for example, 813 + ... + 1245.

It is an arithmetic number, because the mean of its divisors is an integer number (43400).

2⁴⁴⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

445557 is a deficient number, since it is larger than the sum of its proper divisors (248843).

445557 is an equidigital number, since it uses as much as digits as its factorization.

445557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 443 counting only the distinct ones).

The product of its digits is 14000, while the sum is 30.

The square root of 445557 is about 667.5005617975. The cubic root of 445557 is about 76.3779076863.

The spelling of 445557 in words is "four hundred forty-five thousand, five hundred fifty-seven".