421971198 has 16 divisors (see below), whose sum is σ = 920664576. Its totient is φ = 127870040.

The previous prime is 421971197. The next prime is 421971259. The reversal of 421971198 is 891179124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421971191) 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, 3196686 + ... + 3196817.

It is an arithmetic number, because the mean of its divisors is an integer number (57541536).

Almost surely, 2^421971198 is an apocalyptic number.

421971198 is an abundant number, since it is smaller than the sum of its proper divisors (498693378).

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

421971198 is a wasteful number, since it uses less digits than its factorization.

421971198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393519.

The product of its digits is 36288, while the sum is 42.

The square root of 421971198 is about 20541.9375425007. The cubic root of 421971198 is about 750.0570018898.

The spelling of 421971198 in words is "four hundred twenty-one million, nine hundred seventy-one thousand, one hundred ninety-eight".