201245042 has 8 divisors (see below), whose sum is σ = 301929132. Its totient is φ = 100602000.

The previous prime is 201245041. The next prime is 201245053. The reversal of 201245042 is 240542102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120802081 + 80442961 = 10991^2 + 8969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (201245041) 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 3 ways as a sum of consecutive naturals, for example, 9992 + ... + 22412.

Almost surely, 2^201245042 is an apocalyptic number.

201245042 is a deficient number, since it is larger than the sum of its proper divisors (100684090).

201245042 is a wasteful number, since it uses less digits than its factorization.

201245042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20524.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 201245042 is about 14186.0862114961. The cubic root of 201245042 is about 586.0145464983.

Adding to 201245042 its reverse (240542102), we get a palindrome (441787144).

The spelling of 201245042 in words is "two hundred one million, two hundred forty-five thousand, forty-two".