281294129 has 2 divisors, whose sum is σ = 281294130. Its totient is φ = 281294128.

The previous prime is 281294081. The next prime is 281294141. The reversal of 281294129 is 921492182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264810529 + 16483600 = 16273^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 281294129 - 2¹² = 281290033 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 281294092 and 281294101.

It is not a weakly prime, because it can be changed into another prime (281294149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140647064 + 140647065.

It is an arithmetic number, because the mean of its divisors is an integer number (140647065).

Almost surely, 2^281294129 is an apocalyptic number.

It is an amenable number.

281294129 is a deficient number, since it is larger than the sum of its proper divisors (1).

281294129 is an equidigital number, since it uses as much as digits as its factorization.

281294129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 281294129 is about 16771.8254522279. The cubic root of 281294129 is about 655.2196136334.

The spelling of 281294129 in words is "two hundred eighty-one million, two hundred ninety-four thousand, one hundred twenty-nine".