201142135 has 4 divisors (see below), whose sum is σ = 241370568. Its totient is φ = 160913704.

The previous prime is 201142133. The next prime is 201142141. The reversal of 201142135 is 531241102.

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

It is a cyclic number.

It is not a de Polignac number, because 201142135 - 2¹ = 201142133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201142133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20114209 + ... + 20114218.

It is an arithmetic number, because the mean of its divisors is an integer number (60342642).

Almost surely, 2^201142135 is an apocalyptic number.

201142135 is a deficient number, since it is larger than the sum of its proper divisors (40228433).

201142135 is an equidigital number, since it uses as much as digits as its factorization.

201142135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40228432.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 201142135 is about 14182.4587078546. The cubic root of 201142135 is about 585.9146429507.

Adding to 201142135 its reverse (531241102), we get a palindrome (732383237).

The spelling of 201142135 in words is "two hundred one million, one hundred forty-two thousand, one hundred thirty-five".