201245665 has 8 divisors (see below), whose sum is σ = 241643520. Its totient is φ = 160897392.

The previous prime is 201245657. The next prime is 201245669. The reversal of 201245665 is 566542102.

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

It is a cyclic number.

It is not a de Polignac number, because 201245665 - 2³ = 201245657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201245669) 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, 2785 + ... + 20254.

It is an arithmetic number, because the mean of its divisors is an integer number (30205440).

Almost surely, 2^201245665 is an apocalyptic number.

It is an amenable number.

201245665 is a deficient number, since it is larger than the sum of its proper divisors (40397855).

201245665 is a wasteful number, since it uses less digits than its factorization.

201245665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24791.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 201245665 is about 14186.1081696144. The cubic root of 201245665 is about 586.0151512117.

Adding to 201245665 its reverse (566542102), we get a palindrome (767787767).

The spelling of 201245665 in words is "two hundred one million, two hundred forty-five thousand, six hundred sixty-five".