201002 has 4 divisors (see below), whose sum is σ = 301506.
Its totient is φ = 100500.
The previous prime is 200989. The next prime is 201007. The reversal of 201002 is 200102.
Adding to 201002 its reverse (200102), we get a palindrome (401104).
Subtracting from 201002 its reverse (200102), we obtain a square (900 = 302).
Multipling 201002 by its reverse (200102), we get a palindrome (40220902204).
It can be divided in two parts, 20100 and 2, that added together give a palindrome (20102).
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 192721 + 8281 = 439^2 + 91^2
It is not an unprimeable number, because it can be changed into a prime (201007) by changing a digit.
201002 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 (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50249 + ... + 50252.
2201002 is an apocalyptic number.
201002 is a deficient number, since it is larger than the sum of its proper divisors (100504).
201002 is a wasteful number, since it uses less digits than its factorization.
201002 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 100503.
The product of its (nonzero) digits is 4, while the sum is 5.
The square root of 201002 is about 448.3324659223.
The cubic root of 201002 is about 58.5778543133.
The spelling of 201002 in words is "two hundred one thousand, two", and thus it is an iban number.