421158221 has 32 divisors (see below), whose sum is σ = 511370496. Its totient is φ = 342144000.

The previous prime is 421158209. The next prime is 421158229. The reversal of 421158221 is 122851124.

It is not a de Polignac number, because 421158221 - 2¹⁰ = 421157197 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 (421158229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 778211 + ... + 778751.

It is an arithmetic number, because the mean of its divisors is an integer number (15980328).

Almost surely, 2^421158221 is an apocalyptic number.

It is an amenable number.

421158221 is a deficient number, since it is larger than the sum of its proper divisors (90212275).

421158221 is a wasteful number, since it uses less digits than its factorization.

421158221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its digits is 1280, while the sum is 26.

The square root of 421158221 is about 20522.1397763489. The cubic root of 421158221 is about 749.5750012877.

The spelling of 421158221 in words is "four hundred twenty-one million, one hundred fifty-eight thousand, two hundred twenty-one".