521967 has 8 divisors (see below), whose sum is σ = 699696. Its totient is φ = 346112.

The previous prime is 521929. The next prime is 521981. The reversal of 521967 is 769125.

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 521967 - 2⁶ = 521903 is a prime.

521967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521167) 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, 433 + ... + 1109.

It is an arithmetic number, because the mean of its divisors is an integer number (87462).

2⁵²¹⁹⁶⁷ is an apocalyptic number.

521967 is a deficient number, since it is larger than the sum of its proper divisors (177729).

521967 is a wasteful number, since it uses less digits than its factorization.

521967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its digits is 3780, while the sum is 30.

The square root of 521967 is about 722.4728368596. The cubic root of 521967 is about 80.5157820478.

The spelling of 521967 in words is "five hundred twenty-one thousand, nine hundred sixty-seven".