421478071 has 4 divisors (see below), whose sum is σ = 481689232. Its totient is φ = 361266912.

The previous prime is 421478051. The next prime is 421478087. The reversal of 421478071 is 170874124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421478071 - 2⁷ = 421477943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421478011) 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 in 3 ways as a sum of consecutive naturals, for example, 30105570 + ... + 30105583.

It is an arithmetic number, because the mean of its divisors is an integer number (120422308).

Almost surely, 2^421478071 is an apocalyptic number.

421478071 is a deficient number, since it is larger than the sum of its proper divisors (60211161).

421478071 is an equidigital number, since it uses as much as digits as its factorization.

421478071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60211160.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 421478071 is about 20529.9311007124. The cubic root of 421478071 is about 749.7647090067.

The spelling of 421478071 in words is "four hundred twenty-one million, four hundred seventy-eight thousand, seventy-one".