201281 has 2 divisors, whose sum is σ = 201282. Its totient is φ = 201280.

The previous prime is 201251. The next prime is 201287. The reversal of 201281 is 182102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 48400 = 391^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 201281 - 2¹⁰ = 200257 is a prime.

It is a super-2 number, since 2×201281² = 81028081922, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201281.

It is not a weakly prime, because it can be changed into another prime (201287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100640 + 100641.

It is an arithmetic number, because the mean of its divisors is an integer number (100641).

2²⁰¹²⁸¹ is an apocalyptic number.

It is an amenable number.

201281 is a deficient number, since it is larger than the sum of its proper divisors (1).

201281 is an equidigital number, since it uses as much as digits as its factorization.

201281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 201281 is about 448.6435110419. The cubic root of 201281 is about 58.6049446996.

Adding to 201281 its sum of digits (14), we get a triangular number (201295 = T₆₃₄).

Adding to 201281 its reverse (182102), we get a palindrome (383383).

The spelling of 201281 in words is "two hundred one thousand, two hundred eighty-one".