5020781 has 2 divisors, whose sum is σ = 5020782. Its totient is φ = 5020780.

The previous prime is 5020711. The next prime is 5020783. The reversal of 5020781 is 1870205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3865156 + 1155625 = 1966^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 5020781 - 2²² = 826477 is a prime.

It is a super-2 number, since 2×5020781² = 50416483699922, which contains 22 as substring.

Together with 5020783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5020783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510390 + 2510391.

It is an arithmetic number, because the mean of its divisors is an integer number (2510391).

Almost surely, 2^5020781 is an apocalyptic number.

It is an amenable number.

5020781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5020781 is an equidigital number, since it uses as much as digits as its factorization.

5020781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 5020781 is about 2240.7099321420. The cubic root of 5020781 is about 171.2341672897.

Adding to 5020781 its reverse (1870205), we get a palindrome (6890986).

The spelling of 5020781 in words is "five million, twenty thousand, seven hundred eighty-one".