487781 has 8 divisors (see below), whose sum is σ = 590400. Its totient is φ = 393408.

The previous prime is 487769. The next prime is 487783. The reversal of 487781 is 187784.

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

It is a cyclic number.

It is not a de Polignac number, because 487781 - 2⁶ = 487717 is a prime.

It is a super-2 number, since 2×487781² = 475860607922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487783) 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 7 ways as a sum of consecutive naturals, for example, 1931 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (73800).

2⁴⁸⁷⁷⁸¹ is an apocalyptic number.

It is an amenable number.

487781 is a deficient number, since it is larger than the sum of its proper divisors (102619).

487781 is a wasteful number, since it uses less digits than its factorization.

487781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123.

The product of its digits is 12544, while the sum is 35.

The square root of 487781 is about 698.4132014789. The cubic root of 487781 is about 78.7181646747.

The spelling of 487781 in words is "four hundred eighty-seven thousand, seven hundred eighty-one".