421234249 has 2 divisors, whose sum is σ = 421234250. Its totient is φ = 421234248.

The previous prime is 421234243. The next prime is 421234349. The reversal of 421234249 is 942432124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418939024 + 2295225 = 20468^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 421234249 - 2⁹ = 421233737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421234249.

It is not a weakly prime, because it can be changed into another prime (421234243) 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, 210617124 + 210617125.

It is an arithmetic number, because the mean of its divisors is an integer number (210617125).

Almost surely, 2^421234249 is an apocalyptic number.

It is an amenable number.

421234249 is a deficient number, since it is larger than the sum of its proper divisors (1).

421234249 is an equidigital number, since it uses as much as digits as its factorization.

421234249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 421234249 is about 20523.9920337151. The cubic root of 421234249 is about 749.6201033075.

The spelling of 421234249 in words is "four hundred twenty-one million, two hundred thirty-four thousand, two hundred forty-nine".