4781781 has 32 divisors (see below), whose sum is σ = 7603200. Its totient is φ = 2963520.

The previous prime is 4781767. The next prime is 4781783. The reversal of 4781781 is 1871874.

It is not a de Polignac number, because 4781781 - 2⁷ = 4781653 is a prime.

It is a super-2 number, since 2×4781781² = 45730859063922, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781783) 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 31 ways as a sum of consecutive naturals, for example, 24175 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (237600).

Almost surely, 2^4781781 is an apocalyptic number.

It is an amenable number.

4781781 is a deficient number, since it is larger than the sum of its proper divisors (2821419).

4781781 is a wasteful number, since it uses less digits than its factorization.

4781781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 4781781 is about 2186.7283781942. The cubic root of 4781781 is about 168.4728388568.

The spelling of 4781781 in words is "four million, seven hundred eighty-one thousand, seven hundred eighty-one".