450028081 has 2 divisors, whose sum is σ = 450028082. Its totient is φ = 450028080.

The previous prime is 450028069. The next prime is 450028121. The reversal of 450028081 is 180820054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274200481 + 175827600 = 16559^2 + 13260^2 .

It is a cyclic number.

It is not a de Polignac number, because 450028081 - 2⁹ = 450027569 is a prime.

It is a super-2 number, since 2×450028081² = 405050547377085122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (450028001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225014040 + 225014041.

It is an arithmetic number, because the mean of its divisors is an integer number (225014041).

Almost surely, 2^450028081 is an apocalyptic number.

It is an amenable number.

450028081 is a deficient number, since it is larger than the sum of its proper divisors (1).

450028081 is an equidigital number, since it uses as much as digits as its factorization.

450028081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 450028081 is about 21213.8653007885. The cubic root of 450028081 is about 766.3253718658.

The spelling of 450028081 in words is "four hundred fifty million, twenty-eight thousand, eighty-one".