281849 has 2 divisors, whose sum is σ = 281850. Its totient is φ = 281848.

The previous prime is 281839. The next prime is 281857. The reversal of 281849 is 948182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270400 + 11449 = 520^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 281849 - 2⁴ = 281833 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281849.

It is not a weakly prime, because it can be changed into another prime (281839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140924 + 140925.

It is an arithmetic number, because the mean of its divisors is an integer number (140925).

2²⁸¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

281849 is a deficient number, since it is larger than the sum of its proper divisors (1).

281849 is an equidigital number, since it uses as much as digits as its factorization.

281849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 281849 is about 530.8945281315. The cubic root of 281849 is about 65.5650151798.

The spelling of 281849 in words is "two hundred eighty-one thousand, eight hundred forty-nine".