4557645 has 12 divisors (see below), whose sum is σ = 7899996. Its totient is φ = 2430720.

The previous prime is 4557607. The next prime is 4557673. The reversal of 4557645 is 5467554.

It is a happy number.

4557645 is a `hidden beast` number, since 4 + 5 + 5 + 7 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 3896676 = 813^2 + 1974^2 .

It is not a de Polignac number, because 4557645 - 2¹⁰ = 4556621 is a prime.

It is a super-3 number, since 3×4557645³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 50596 + ... + 50685.

It is an arithmetic number, because the mean of its divisors is an integer number (658333).

Almost surely, 2^4557645 is an apocalyptic number.

4557645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4557645 is a deficient number, since it is larger than the sum of its proper divisors (3342351).

4557645 is a wasteful number, since it uses less digits than its factorization.

4557645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101292 (or 101289 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 4557645 is about 2134.8641642971. The cubic root of 4557645 is about 165.7983349681.

Subtracting 4557645 from its reverse (5467554), we obtain a palindrome (909909).

It can be divided in two parts, 455 and 7645, that added together give a square (8100 = 90²).

The spelling of 4557645 in words is "four million, five hundred fifty-seven thousand, six hundred forty-five".