675645 has 16 divisors (see below), whose sum is σ = 1116672. Its totient is φ = 348480.

The previous prime is 675643. The next prime is 675713. The reversal of 675645 is 546576.

It is not a de Polignac number, because 675645 - 2¹ = 675643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (69792).

2⁶⁷⁵⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

675645 is a deficient number, since it is larger than the sum of its proper divisors (441027).

675645 is a wasteful number, since it uses less digits than its factorization.

675645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its digits is 25200, while the sum is 33.

The square root of 675645 is about 821.9762770299. The cubic root of 675645 is about 87.7484638654.

Adding to 675645 its reverse (546576), we get a palindrome (1222221).

The spelling of 675645 in words is "six hundred seventy-five thousand, six hundred forty-five".