521467 has 4 divisors (see below), whose sum is σ = 531360. Its totient is φ = 511576.

The previous prime is 521447. The next prime is 521471. The reversal of 521467 is 764125.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521467 is a prime.

It is a Duffinian number.

521467 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (521447) 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, 4867 + ... + 4972.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2⁵²¹⁴⁶⁷ is an apocalyptic number.

521467 is a deficient number, since it is larger than the sum of its proper divisors (9893).

521467 is an equidigital number, since it uses as much as digits as its factorization.

521467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9892.

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

The square root of 521467 is about 722.1267201814. The cubic root of 521467 is about 80.4900647435.

The spelling of 521467 in words is "five hundred twenty-one thousand, four hundred sixty-seven".