5256781 has 2 divisors, whose sum is σ = 5256782. Its totient is φ = 5256780.

The previous prime is 5256773. The next prime is 5256817. The reversal of 5256781 is 1876525.

5256781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (5256817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5248681 + 8100 = 2291^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 5256781 - 2³ = 5256773 is a prime.

It is a super-2 number, since 2×5256781² = 55267492963922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5256751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628390 + 2628391.

It is an arithmetic number, because the mean of its divisors is an integer number (2628391).

Almost surely, 2^5256781 is an apocalyptic number.

It is an amenable number.

5256781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5256781 is an equidigital number, since it uses as much as digits as its factorization.

5256781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 5256781 is about 2292.7671054863. The cubic root of 5256781 is about 173.8761284212.

The spelling of 5256781 in words is "five million, two hundred fifty-six thousand, seven hundred eighty-one".