675521 has 16 divisors (see below), whose sum is σ = 872448. Its totient is φ = 507600.

The previous prime is 675511. The next prime is 675539. The reversal of 675521 is 125576.

It is a cyclic number.

It is not a de Polignac number, because 675521 - 2⁶ = 675457 is a prime.

It is a super-5 number, since 5×675521⁵ (a number of 30 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675511) 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, 2246 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (54528).

2⁶⁷⁵⁵²¹ is an apocalyptic number.

It is an amenable number.

675521 is a deficient number, since it is larger than the sum of its proper divisors (196927).

675521 is a wasteful number, since it uses less digits than its factorization.

675521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

The product of its digits is 2100, while the sum is 26.

The square root of 675521 is about 821.9008456012. The cubic root of 675521 is about 87.7430954273.

Subtracting from 675521 its reverse (125576), we obtain a palindrome (549945).

It can be divided in two parts, 6755 and 21, that added together give a palindrome (6776).

The spelling of 675521 in words is "six hundred seventy-five thousand, five hundred twenty-one".