487861 has 4 divisors (see below), whose sum is σ = 532224. Its totient is φ = 443500.

The previous prime is 487843. The next prime is 487873. The reversal of 487861 is 168784.

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 487861 - 2⁵ = 487829 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487811) 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, 22165 + ... + 22186.

It is an arithmetic number, because the mean of its divisors is an integer number (133056).

2⁴⁸⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

487861 is a deficient number, since it is larger than the sum of its proper divisors (44363).

487861 is a wasteful number, since it uses less digits than its factorization.

487861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44362.

The product of its digits is 10752, while the sum is 34.

The square root of 487861 is about 698.4704718168. The cubic root of 487861 is about 78.7224679097.

The spelling of 487861 in words is "four hundred eighty-seven thousand, eight hundred sixty-one".