421403489 has 8 divisors (see below), whose sum is σ = 477704640. Its totient is φ = 368514576.

The previous prime is 421403467. The next prime is 421403501. The reversal of 421403489 is 984304124.

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

It is not a de Polignac number, because 421403489 - 2¹² = 421399393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421403789) 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, 852797 + ... + 853290.

It is an arithmetic number, because the mean of its divisors is an integer number (59713080).

Almost surely, 2^421403489 is an apocalyptic number.

It is an amenable number.

421403489 is a deficient number, since it is larger than the sum of its proper divisors (56301151).

421403489 is a wasteful number, since it uses less digits than its factorization.

421403489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706119.

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

The square root of 421403489 is about 20528.1145992514. The cubic root of 421403489 is about 749.7204819132.

The spelling of 421403489 in words is "four hundred twenty-one million, four hundred three thousand, four hundred eighty-nine".