421834409 has 8 divisors (see below), whose sum is σ = 444828000. Its totient is φ = 398920032.

The previous prime is 421834397. The next prime is 421834417. The reversal of 421834409 is 904438124.

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 421834409 - 2⁴ = 421834393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421834489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8699 + ... + 30320.

It is an arithmetic number, because the mean of its divisors is an integer number (55603500).

Almost surely, 2^421834409 is an apocalyptic number.

It is an amenable number.

421834409 is a deficient number, since it is larger than the sum of its proper divisors (22993591).

421834409 is a wasteful number, since it uses less digits than its factorization.

421834409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39607.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 421834409 is about 20538.6077668376. The cubic root of 421834409 is about 749.9759453026.

The spelling of 421834409 in words is "four hundred twenty-one million, eight hundred thirty-four thousand, four hundred nine".