421044749 has 2 divisors, whose sum is σ = 421044750. Its totient is φ = 421044748.

The previous prime is 421044737. The next prime is 421044779. The reversal of 421044749 is 947440124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347822500 + 73222249 = 18650^2 + 8557^2 .

It is a cyclic number.

It is not a de Polignac number, because 421044749 - 2¹⁶ = 420979213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421044779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210522374 + 210522375.

It is an arithmetic number, because the mean of its divisors is an integer number (210522375).

Almost surely, 2^421044749 is an apocalyptic number.

It is an amenable number.

421044749 is a deficient number, since it is larger than the sum of its proper divisors (1).

421044749 is an equidigital number, since it uses as much as digits as its factorization.

421044749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 421044749 is about 20519.3749661143. The cubic root of 421044749 is about 749.5076763013.

The spelling of 421044749 in words is "four hundred twenty-one million, forty-four thousand, seven hundred forty-nine".