201142001 has 4 divisors (see below), whose sum is σ = 201644004. Its totient is φ = 200640000.

The previous prime is 201141989. The next prime is 201142009. The reversal of 201142001 is 100241102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147501025 + 53640976 = 12145^2 + 7324^2 .

It is a cyclic number.

It is not a de Polignac number, because 201142001 - 2¹⁰ = 201140977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201142009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250400 + ... + 251201.

It is an arithmetic number, because the mean of its divisors is an integer number (50411001).

Almost surely, 2^201142001 is an apocalyptic number.

It is an amenable number.

201142001 is a deficient number, since it is larger than the sum of its proper divisors (502003).

201142001 is an equidigital number, since it uses as much as digits as its factorization.

201142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502002.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 201142001 is about 14182.4539837082. The cubic root of 201142001 is about 585.9145128395.

Adding to 201142001 its reverse (100241102), we get a palindrome (301383103).

The spelling of 201142001 in words is "two hundred one million, one hundred forty-two thousand, one".