4881781 has 4 divisors (see below), whose sum is σ = 4888512. Its totient is φ = 4875052.

The previous prime is 4881763. The next prime is 4881791. The reversal of 4881781 is 1871884.

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 4881781 - 2¹¹ = 4879733 is a prime.

It is a super-2 number, since 2×4881781² = 47663571463922, which contains 22 as substring.

It is a Duffinian number.

4881781 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4881781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4881731) 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, 2125 + ... + 3778.

It is an arithmetic number, because the mean of its divisors is an integer number (1222128).

Almost surely, 2^4881781 is an apocalyptic number.

It is an amenable number.

4881781 is a deficient number, since it is larger than the sum of its proper divisors (6731).

4881781 is an equidigital number, since it uses as much as digits as its factorization.

4881781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730.

The product of its digits is 14336, while the sum is 37.

The square root of 4881781 is about 2209.4752770737. The cubic root of 4881781 is about 169.6391538630.

The spelling of 4881781 in words is "four million, eight hundred eighty-one thousand, seven hundred eighty-one".