420430249 has 2 divisors, whose sum is σ = 420430250. Its totient is φ = 420430248.

The previous prime is 420430211. The next prime is 420430253. The reversal of 420430249 is 942034024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384944400 + 35485849 = 19620^2 + 5957^2 .

It is a cyclic number.

It is not a de Polignac number, because 420430249 - 2¹⁹ = 419905961 is a prime.

It is not a weakly prime, because it can be changed into another prime (420430279) 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, 210215124 + 210215125.

It is an arithmetic number, because the mean of its divisors is an integer number (210215125).

Almost surely, 2^420430249 is an apocalyptic number.

It is an amenable number.

420430249 is a deficient number, since it is larger than the sum of its proper divisors (1).

420430249 is an equidigital number, since it uses as much as digits as its factorization.

420430249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420430249 is about 20504.3958457693. The cubic root of 420430249 is about 749.1428720747.

It can be divided in two parts, 4204 and 30249, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 420430249 in words is "four hundred twenty million, four hundred thirty thousand, two hundred forty-nine".