4942781 has 2 divisors, whose sum is σ = 4942782. Its totient is φ = 4942780.

The previous prime is 4942771. The next prime is 4942799. The reversal of 4942781 is 1872494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 1666681 = 1810^2 + 1291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4942781 is a prime.

It is a super-2 number, since 2×4942781² = 48862168027922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4942711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2471390 + 2471391.

It is an arithmetic number, because the mean of its divisors is an integer number (2471391).

Almost surely, 2^4942781 is an apocalyptic number.

It is an amenable number.

4942781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4942781 is an equidigital number, since it uses as much as digits as its factorization.

4942781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 4942781 is about 2223.2366045925. The cubic root of 4942781 is about 170.3428030865.

The spelling of 4942781 in words is "four million, nine hundred forty-two thousand, seven hundred eighty-one".