254545021 has 2 divisors, whose sum is σ = 254545022. Its totient is φ = 254545020.

The previous prime is 254545013. The next prime is 254545037. The reversal of 254545021 is 120545452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250588900 + 3956121 = 15830^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 254545021 - 2³ = 254545013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254545321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127272510 + 127272511.

It is an arithmetic number, because the mean of its divisors is an integer number (127272511).

Almost surely, 2^254545021 is an apocalyptic number.

It is an amenable number.

254545021 is a deficient number, since it is larger than the sum of its proper divisors (1).

254545021 is an equidigital number, since it uses as much as digits as its factorization.

254545021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 254545021 is about 15954.4671173938. The cubic root of 254545021 is about 633.7551996015.

The spelling of 254545021 in words is "two hundred fifty-four million, five hundred forty-five thousand, twenty-one".