421917439 has 8 divisors (see below), whose sum is σ = 444589040. Its totient is φ = 399292416.

The previous prime is 421917421. The next prime is 421917467. The reversal of 421917439 is 934719124.

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 421917439 - 2⁹ = 421916927 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 (421917739) 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 7 ways as a sum of consecutive naturals, for example, 7807 + ... + 30079.

It is an arithmetic number, because the mean of its divisors is an integer number (55573630).

Almost surely, 2^421917439 is an apocalyptic number.

421917439 is a deficient number, since it is larger than the sum of its proper divisors (22671601).

421917439 is a wasteful number, since it uses less digits than its factorization.

421917439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23289.

The product of its digits is 54432, while the sum is 40.

The square root of 421917439 is about 20540.6289825799. The cubic root of 421917439 is about 750.0251481938.

The spelling of 421917439 in words is "four hundred twenty-one million, nine hundred seventeen thousand, four hundred thirty-nine".