4811781 has 8 divisors (see below), whose sum is σ = 6909280. Its totient is φ = 2961072.

The previous prime is 4811777. The next prime is 4811783. The reversal of 4811781 is 1871184.

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

It is not a de Polignac number, because 4811781 - 2² = 4811777 is a prime.

It is a super-2 number, since 2×4811781² = 46306472783922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4811783) 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, 61651 + ... + 61728.

It is an arithmetic number, because the mean of its divisors is an integer number (863660).

Almost surely, 2^4811781 is an apocalyptic number.

It is an amenable number.

4811781 is a deficient number, since it is larger than the sum of its proper divisors (2097499).

4811781 is a wasteful number, since it uses less digits than its factorization.

4811781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123395.

The product of its digits is 1792, while the sum is 30.

The square root of 4811781 is about 2193.5772154178. The cubic root of 4811781 is about 168.8244269772.

The spelling of 4811781 in words is "four million, eight hundred eleven thousand, seven hundred eighty-one".