421158906 has 64 divisors (see below), whose sum is σ = 1072051200. Its totient is φ = 120056688.

The previous prime is 421158889. The next prime is 421158919. The reversal of 421158906 is 609851124.

It is a super-3 number, since 3×421158906³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211825 + ... + 213803.

It is an arithmetic number, because the mean of its divisors is an integer number (16750800).

Almost surely, 2^421158906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421158906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536025600).

421158906 is an abundant number, since it is smaller than the sum of its proper divisors (650892294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421158906 is a wasteful number, since it uses less digits than its factorization.

421158906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 421158906 is about 20522.1564656349. The cubic root of 421158906 is about 749.5754076738.

The spelling of 421158906 in words is "four hundred twenty-one million, one hundred fifty-eight thousand, nine hundred six".