201242 has 4 divisors (see below), whose sum is σ = 301866. Its totient is φ = 100620.

The previous prime is 201233. The next prime is 201247. The reversal of 201242 is 242102.

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., 128881 + 72361 = 359^2 + 269^2 .

It is not an unprimeable number, because it can be changed into a prime (201247) by changing a digit.

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, 50309 + ... + 50312.

2²⁰¹²⁴² is an apocalyptic number.

201242 is a deficient number, since it is larger than the sum of its proper divisors (100624).

201242 is a wasteful number, since it uses less digits than its factorization.

201242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100623.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 201242 is about 448.6000445831. The cubic root of 201242 is about 58.6011593771.

Adding to 201242 its reverse (242102), we get a palindrome (443344).

The spelling of 201242 in words is "two hundred one thousand, two hundred forty-two", and thus it is an iban number.