674621 has 4 divisors (see below), whose sum is σ = 692892. Its totient is φ = 656352.

The previous prime is 674603. The next prime is 674647. The reversal of 674621 is 126476.

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 525625 + 148996 = 725^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674621 is a prime.

It is a super-2 number, since 2×674621² = 910226987282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9080 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (173223).

2⁶⁷⁴⁶²¹ is an apocalyptic number.

It is an amenable number.

674621 is a deficient number, since it is larger than the sum of its proper divisors (18271).

674621 is a wasteful number, since it uses less digits than its factorization.

674621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18270.

The product of its digits is 2016, while the sum is 26.

The square root of 674621 is about 821.3531518172. The cubic root of 674621 is about 87.7041112545.

The spelling of 674621 in words is "six hundred seventy-four thousand, six hundred twenty-one".