487921 has 8 divisors (see below), whose sum is σ = 570944. Its totient is φ = 408240.

The previous prime is 487897. The next prime is 487933. The reversal of 487921 is 129784.

487921 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 487921 - 2⁵ = 487889 is a prime.

It is a Duffinian number.

487921 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (487021) 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, 510 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (71368).

2⁴⁸⁷⁹²¹ is an apocalyptic number.

It is an amenable number.

487921 is a deficient number, since it is larger than the sum of its proper divisors (83023).

487921 is a wasteful number, since it uses less digits than its factorization.

487921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 4032, while the sum is 31.

The square root of 487921 is about 698.5134214888. The cubic root of 487921 is about 78.7256950273.

It can be divided in two parts, 4879 and 21, that added together give a square (4900 = 70²).

The spelling of 487921 in words is "four hundred eighty-seven thousand, nine hundred twenty-one".