421345406 has 8 divisors (see below), whose sum is σ = 665282280. Its totient is φ = 199584648.

The previous prime is 421345403. The next prime is 421345409. The reversal of 421345406 is 604543124.

It is an interprime number because it is at equal distance from previous prime (421345403) and next prime (421345409).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421345403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5543981 + ... + 5544056.

It is an arithmetic number, because the mean of its divisors is an integer number (83160285).

Almost surely, 2^421345406 is an apocalyptic number.

421345406 is a deficient number, since it is larger than the sum of its proper divisors (243936874).

421345406 is a wasteful number, since it uses less digits than its factorization.

421345406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11088058.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 421345406 is about 20526.6998321698. The cubic root of 421345406 is about 749.6860351049.

The spelling of 421345406 in words is "four hundred twenty-one million, three hundred forty-five thousand, four hundred six".