252841781 has 2 divisors, whose sum is σ = 252841782. Its totient is φ = 252841780.

The previous prime is 252841733. The next prime is 252841843. The reversal of 252841781 is 187148252.

252841781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212722225 + 40119556 = 14585^2 + 6334^2 .

It is a cyclic number.

It is not a de Polignac number, because 252841781 - 2¹⁸ = 252579637 is a prime.

It is a super-2 number, since 2×252841781² = 127857932438503922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252841081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126420890 + 126420891.

It is an arithmetic number, because the mean of its divisors is an integer number (126420891).

Almost surely, 2^252841781 is an apocalyptic number.

It is an amenable number.

252841781 is a deficient number, since it is larger than the sum of its proper divisors (1).

252841781 is an equidigital number, since it uses as much as digits as its factorization.

252841781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 38.

The square root of 252841781 is about 15900.9993711087. Note that the first 3 decimals coincide. The cubic root of 252841781 is about 632.3384838618.

The spelling of 252841781 in words is "two hundred fifty-two million, eight hundred forty-one thousand, seven hundred eighty-one".