521674 has 8 divisors (see below), whose sum is σ = 790020. Its totient is φ = 258336.

The previous prime is 521671. The next prime is 521693. The reversal of 521674 is 476125.

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 24649 = 705^2 + 157^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (521671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979 + ... + 1414.

2⁵²¹⁶⁷⁴ is an apocalyptic number.

521674 is a deficient number, since it is larger than the sum of its proper divisors (268346).

521674 is a wasteful number, since it uses less digits than its factorization.

521674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504.

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

The square root of 521674 is about 722.2700326055. The cubic root of 521674 is about 80.5007137007.

Adding to 521674 its reverse (476125), we get a palindrome (997799).

The spelling of 521674 in words is "five hundred twenty-one thousand, six hundred seventy-four".