4540781 has 6 divisors (see below), whose sum is σ = 5282190. Its totient is φ = 3892056.

The previous prime is 4540777. The next prime is 4540807. The reversal of 4540781 is 1870454.

It can be written as a sum of positive squares in only one way, i.e., 3363556 + 1177225 = 1834^2 + 1085^2 .

It is not a de Polignac number, because 4540781 - 2² = 4540777 is a prime.

It is a super-2 number, since 2×4540781² = 41237384179922, 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 (4540741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46286 + ... + 46383.

It is an arithmetic number, because the mean of its divisors is an integer number (880365).

Almost surely, 2^4540781 is an apocalyptic number.

It is an amenable number.

4540781 is a deficient number, since it is larger than the sum of its proper divisors (741409).

4540781 is an equidigital number, since it uses as much as digits as its factorization.

4540781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92683 (or 92676 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 4540781 is about 2130.9108381159. The cubic root of 4540781 is about 165.5935889643.

The spelling of 4540781 in words is "four million, five hundred forty thousand, seven hundred eighty-one".