198342261 has 12 divisors (see below), whose sum is σ = 308532588. Its totient is φ = 122056704.

The previous prime is 198342257. The next prime is 198342283. The reversal of 198342261 is 162243891.

It can be written as a sum of positive squares in 2 ways, for example, as 38825361 + 159516900 = 6231^2 + 12630^2 .

It is not a de Polignac number, because 198342261 - 2² = 198342257 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198342211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 847500 + ... + 847733.

It is an arithmetic number, because the mean of its divisors is an integer number (25711049).

Almost surely, 2^198342261 is an apocalyptic number.

It is an amenable number.

198342261 is a deficient number, since it is larger than the sum of its proper divisors (110190327).

198342261 is a wasteful number, since it uses less digits than its factorization.

198342261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695252 (or 1695249 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 198342261 is about 14083.4037434137. The cubic root of 198342261 is about 583.1833100639.

It can be divided in two parts, 1983 and 42261, that added together give a palindrome (44244).

The spelling of 198342261 in words is "one hundred ninety-eight million, three hundred forty-two thousand, two hundred sixty-one".