674921 has 8 divisors (see below), whose sum is σ = 733320. Its totient is φ = 617472.

The previous prime is 674903. The next prime is 674929. The reversal of 674921 is 129476.

It can be written as a sum of positive squares in 4 ways, for example, as 26896 + 648025 = 164^2 + 805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 674921 - 2⁶ = 674857 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (91665).

2⁶⁷⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

674921 is a deficient number, since it is larger than the sum of its proper divisors (58399).

674921 is a wasteful number, since it uses less digits than its factorization.

674921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its digits is 3024, while the sum is 29.

The square root of 674921 is about 821.5357569820. The cubic root of 674921 is about 87.7171098291.

The spelling of 674921 in words is "six hundred seventy-four thousand, nine hundred twenty-one".