674945 has 4 divisors (see below), whose sum is σ = 809940. Its totient is φ = 539952.

The previous prime is 674941. The next prime is 674953. The reversal of 674945 is 549476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 473344 + 201601 = 688^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 674945 - 2² = 674941 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67490 + ... + 67499.

It is an arithmetic number, because the mean of its divisors is an integer number (202485).

2⁶⁷⁴⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

674945 is a deficient number, since it is larger than the sum of its proper divisors (134995).

674945 is a wasteful number, since it uses less digits than its factorization.

674945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134994.

The product of its digits is 30240, while the sum is 35.

The square root of 674945 is about 821.5503636418. The cubic root of 674945 is about 87.7181495487.

The spelling of 674945 in words is "six hundred seventy-four thousand, nine hundred forty-five".