428571449 has 2 divisors, whose sum is σ = 428571450. Its totient is φ = 428571448.

The previous prime is 428571433. The next prime is 428571461. The reversal of 428571449 is 944175824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214476025 + 214095424 = 14645^2 + 14632^2 .

It is a cyclic number.

It is not a de Polignac number, because 428571449 - 2⁴ = 428571433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (428571469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214285724 + 214285725.

It is an arithmetic number, because the mean of its divisors is an integer number (214285725).

Almost surely, 2^428571449 is an apocalyptic number.

It is an amenable number.

428571449 is a deficient number, since it is larger than the sum of its proper divisors (1).

428571449 is an equidigital number, since it uses as much as digits as its factorization.

428571449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 428571449 is about 20701.9672736675. The cubic root of 428571449 is about 753.9474531085.

The spelling of 428571449 in words is "four hundred twenty-eight million, five hundred seventy-one thousand, four hundred forty-nine".