4981781 has 12 divisors (see below), whose sum is σ = 6101280. Its totient is φ = 4044600.

The previous prime is 4981771. The next prime is 4981789. The reversal of 4981781 is 1871894.

It is not a de Polignac number, because 4981781 - 2¹⁴ = 4965397 is a prime.

It is a super-2 number, since 2×4981781² = 49636283863922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4981789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1745 + ... + 3606.

It is an arithmetic number, because the mean of its divisors is an integer number (508440).

Almost surely, 2^4981781 is an apocalyptic number.

It is an amenable number.

4981781 is a deficient number, since it is larger than the sum of its proper divisors (1119499).

4981781 is a wasteful number, since it uses less digits than its factorization.

4981781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384 (or 5377 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 4981781 is about 2231.9903673627. The cubic root of 4981781 is about 170.7896482125.

The spelling of 4981781 in words is "four million, nine hundred eighty-one thousand, seven hundred eighty-one".