674521 has 4 divisors (see below), whose sum is σ = 703872. Its totient is φ = 645172.

The previous prime is 674501. The next prime is 674533. The reversal of 674521 is 125476.

674521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 674521 - 2⁷ = 674393 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

674521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (674501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14641 + ... + 14686.

It is an arithmetic number, because the mean of its divisors is an integer number (175968).

2⁶⁷⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

674521 is a deficient number, since it is larger than the sum of its proper divisors (29351).

674521 is a wasteful number, since it uses less digits than its factorization.

674521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29350.

The product of its digits is 1680, while the sum is 25.

The square root of 674521 is about 821.2922744066. The cubic root of 674521 is about 87.6997775400.

Adding to 674521 its reverse (125476), we get a palindrome (799997).

The spelling of 674521 in words is "six hundred seventy-four thousand, five hundred twenty-one".