254421217 has 2 divisors, whose sum is σ = 254421218. Its totient is φ = 254421216.

The previous prime is 254421173. The next prime is 254421221. The reversal of 254421217 is 712124452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247244176 + 7177041 = 15724^2 + 2679^2 .

It is a cyclic number.

It is not a de Polignac number, because 254421217 - 2²³ = 246032609 is a prime.

It is a super-2 number, since 2×254421217² = 129460311319522178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (254421017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127210608 + 127210609.

It is an arithmetic number, because the mean of its divisors is an integer number (127210609).

Almost surely, 2^254421217 is an apocalyptic number.

It is an amenable number.

254421217 is a deficient number, since it is larger than the sum of its proper divisors (1).

254421217 is an equidigital number, since it uses as much as digits as its factorization.

254421217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 28.

The square root of 254421217 is about 15950.5867290203. The cubic root of 254421217 is about 633.6524356551.

Adding to 254421217 its reverse (712124452), we get a palindrome (966545669).

The spelling of 254421217 in words is "two hundred fifty-four million, four hundred twenty-one thousand, two hundred seventeen".