421421455249 has 2 divisors, whose sum is σ = 421421455250. Its totient is φ = 421421455248.

The previous prime is 421421455243. The next prime is 421421455271. The reversal of 421421455249 is 942554124124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256991205249 + 164430250000 = 506943^2 + 405500^2 .

It is a cyclic number.

It is not a de Polignac number, because 421421455249 - 2¹⁹ = 421420930961 is a prime.

It is not a weakly prime, because it can be changed into another prime (421421455243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210710727624 + 210710727625.

It is an arithmetic number, because the mean of its divisors is an integer number (210710727625).

Almost surely, 2^421421455249 is an apocalyptic number.

It is an amenable number.

421421455249 is a deficient number, since it is larger than the sum of its proper divisors (1).

421421455249 is an equidigital number, since it uses as much as digits as its factorization.

421421455249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 43.

The spelling of 421421455249 in words is "four hundred twenty-one billion, four hundred twenty-one million, four hundred fifty-five thousand, two hundred forty-nine".