421730849 has 8 divisors (see below), whose sum is σ = 447693480. Its totient is φ = 395896576.

The previous prime is 421730833. The next prime is 421730863. The reversal of 421730849 is 948037124.

It can be written as a sum of positive squares in 4 ways, for example, as 5856400 + 415874449 = 2420^2 + 20393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421730849 - 2⁴ = 421730833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421730819) 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 in 7 ways as a sum of consecutive naturals, for example, 25274 + ... + 38499.

It is an arithmetic number, because the mean of its divisors is an integer number (55961685).

Almost surely, 2^421730849 is an apocalyptic number.

It is an amenable number.

421730849 is a deficient number, since it is larger than the sum of its proper divisors (25962631).

421730849 is a wasteful number, since it uses less digits than its factorization.

421730849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64179.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 421730849 is about 20536.0865064403. The cubic root of 421730849 is about 749.9145674539.

The spelling of 421730849 in words is "four hundred twenty-one million, seven hundred thirty thousand, eight hundred forty-nine".