280129 has 2 divisors, whose sum is σ = 280130. Its totient is φ = 280128.

The previous prime is 280121. The next prime is 280139. The reversal of 280129 is 921082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230400 + 49729 = 480^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 280129 - 2³ = 280121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140064 + 140065.

It is an arithmetic number, because the mean of its divisors is an integer number (140065).

2²⁸⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

280129 is a deficient number, since it is larger than the sum of its proper divisors (1).

280129 is an equidigital number, since it uses as much as digits as its factorization.

280129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 280129 is about 529.2721417192. The cubic root of 280129 is about 65.4313715078.

Subtracting from 280129 its product of nonzero digits (288), we obtain a 4-th power (279841 = 23⁴).

The spelling of 280129 in words is "two hundred eighty thousand, one hundred twenty-nine".