481781 has 4 divisors (see below), whose sum is σ = 502752. Its totient is φ = 460812.

The previous prime is 481769. The next prime is 481787. The reversal of 481781 is 187184.

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 a de Polignac number, because none of the positive numbers 2^k-481781 is a prime.

It is a super-2 number, since 2×481781² = 464225863922, 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 (481787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10451 + ... + 10496.

It is an arithmetic number, because the mean of its divisors is an integer number (125688).

2⁴⁸¹⁷⁸¹ is an apocalyptic number.

It is an amenable number.

481781 is a deficient number, since it is larger than the sum of its proper divisors (20971).

481781 is a wasteful number, since it uses less digits than its factorization.

481781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20970.

The product of its digits is 1792, while the sum is 29.

The square root of 481781 is about 694.1044589973. The cubic root of 481781 is about 78.3940719001.

The spelling of 481781 in words is "four hundred eighty-one thousand, seven hundred eighty-one".