201142565 has 8 divisors (see below), whose sum is σ = 259938168. Its totient is φ = 148536000.

The previous prime is 201142561. The next prime is 201142631. The reversal of 201142565 is 565241102.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 200987329 = 394^2 + 14177^2 .

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

It is not a de Polignac number, because 201142565 - 2² = 201142561 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 (201142561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547186 + ... + 1547315.

It is an arithmetic number, because the mean of its divisors is an integer number (32492271).

Almost surely, 2^201142565 is an apocalyptic number.

It is an amenable number.

201142565 is a deficient number, since it is larger than the sum of its proper divisors (58795603).

201142565 is a wasteful number, since it uses less digits than its factorization.

201142565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094519.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 201142565 is about 14182.4738674182. The cubic root of 201142565 is about 585.9150604716.

Adding to 201142565 its reverse (565241102), we get a palindrome (766383667).

The spelling of 201142565 in words is "two hundred one million, one hundred forty-two thousand, five hundred sixty-five".