674581 has 4 divisors (see below), whose sum is σ = 683200. Its totient is φ = 665964.

The previous prime is 674563. The next prime is 674603. The reversal of 674581 is 185476.

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 674581 - 2¹⁵ = 641813 is a prime.

It is a super-2 number, since 2×674581² = 910119051122, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent 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, 4191 + ... + 4348.

It is an arithmetic number, because the mean of its divisors is an integer number (170800).

2⁶⁷⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

674581 is a deficient number, since it is larger than the sum of its proper divisors (8619).

674581 is an equidigital number, since it uses as much as digits as its factorization.

674581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618.

The product of its digits is 6720, while the sum is 31.

The square root of 674581 is about 821.3288013944. The cubic root of 674581 is about 87.7023778201.

The spelling of 674581 in words is "six hundred seventy-four thousand, five hundred eighty-one".