201598 has 4 divisors (see below), whose sum is σ = 302400.
Its totient is φ = 100798.
The previous prime is 201589. The next prime is 201599. The reversal of 201598 is 895102.
It is a semiprime because it is the product of two primes.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (201599) by changing a digit.
201598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50398 + ... + 50401.
It is an arithmetic number, because the mean of its divisors is an integer number (75600).
2201598 is an apocalyptic number.
201598 is a deficient number, since it is larger than the sum of its proper divisors (100802).
201598 is a wasteful number, since it uses less digits than its factorization.
201598 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 100801.
The product of its (nonzero) digits is 720, while the sum is 25.
The square root of 201598 is about 448.9966592303.
The cubic root of 201598 is about 58.6356944527.
The spelling of 201598 in words is "two hundred one thousand, five hundred ninety-eight".