521887 has 2 divisors, whose sum is σ = 521888. Its totient is φ = 521886.

The previous prime is 521881. The next prime is 521897. The reversal of 521887 is 788125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521887 - 2³ = 521879 is a prime.

It is a super-3 number, since 3×521887³ = 426432887756433309, which contains 333 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260943 + 260944.

It is an arithmetic number, because the mean of its divisors is an integer number (260944).

2⁵²¹⁸⁸⁷ is an apocalyptic number.

521887 is a deficient number, since it is larger than the sum of its proper divisors (1).

521887 is an equidigital number, since it uses as much as digits as its factorization.

521887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 31.

The square root of 521887 is about 722.4174693347. The cubic root of 521887 is about 80.5116683831.

The spelling of 521887 in words is "five hundred twenty-one thousand, eight hundred eighty-seven".