281004121 has 2 divisors, whose sum is σ = 281004122. Its totient is φ = 281004120.

The previous prime is 281004107. The next prime is 281004127. The reversal of 281004121 is 121400182.

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., 280194121 + 810000 = 16739^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 281004121 - 2⁹ = 281003609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281004127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140502060 + 140502061.

It is an arithmetic number, because the mean of its divisors is an integer number (140502061).

Almost surely, 2^281004121 is an apocalyptic number.

It is an amenable number.

281004121 is a deficient number, since it is larger than the sum of its proper divisors (1).

281004121 is an equidigital number, since it uses as much as digits as its factorization.

281004121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 281004121 is about 16763.1775329142. The cubic root of 281004121 is about 654.9943639163.

The spelling of 281004121 in words is "two hundred eighty-one million, four thousand, one hundred twenty-one".