487581 has 4 divisors (see below), whose sum is σ = 650112. Its totient is φ = 325052.

The previous prime is 487561. The next prime is 487589. The reversal of 487581 is 185784.

It is a happy number.

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 487581 - 2¹⁷ = 356509 is a prime.

It is a super-2 number, since 2×487581² = 475470463122, which contains 22 as substring.

It is a D-number.

487581 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81261 + ... + 81266.

It is an arithmetic number, because the mean of its divisors is an integer number (162528).

2⁴⁸⁷⁵⁸¹ is an apocalyptic number.

It is an amenable number.

487581 is a deficient number, since it is larger than the sum of its proper divisors (162531).

487581 is a wasteful number, since it uses less digits than its factorization.

487581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162530.

The product of its digits is 8960, while the sum is 33.

The square root of 487581 is about 698.2700050840. The cubic root of 487581 is about 78.7074045281.

The spelling of 487581 in words is "four hundred eighty-seven thousand, five hundred eighty-one".