198059421 has 36 divisors (see below), whose sum is σ = 312648192. Its totient is φ = 111195504.

The previous prime is 198059413. The next prime is 198059423. The reversal of 198059421 is 124950891.

It is not a de Polignac number, because 198059421 - 2³ = 198059413 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198059421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198059423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1559460 + ... + 1559586.

It is an arithmetic number, because the mean of its divisors is an integer number (8684672).

Almost surely, 2^198059421 is an apocalyptic number.

It is an amenable number.

198059421 is a deficient number, since it is larger than the sum of its proper divisors (114588771).

198059421 is a wasteful number, since it uses less digits than its factorization.

198059421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 198059421 is about 14073.3585543750. The cubic root of 198059421 is about 582.9059678661.

The spelling of 198059421 in words is "one hundred ninety-eight million, fifty-nine thousand, four hundred twenty-one".