201020145 has 8 divisors (see below), whose sum is σ = 321632256. Its totient is φ = 107210736.

The previous prime is 201020129. The next prime is 201020147. The reversal of 201020145 is 541020102.

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

It is not a de Polignac number, because 201020145 - 2⁴ = 201020129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 13401343 = 201020145 / (2 + 0 + 1 + 0 + 2 + 0 + 1 + 4 + 5).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201020147) 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, 6700657 + ... + 6700686.

It is an arithmetic number, because the mean of its divisors is an integer number (40204032).

Almost surely, 2^201020145 is an apocalyptic number.

It is an amenable number.

201020145 is a deficient number, since it is larger than the sum of its proper divisors (120612111).

201020145 is a wasteful number, since it uses less digits than its factorization.

201020145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13401351.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 201020145 is about 14178.1573203290. The cubic root of 201020145 is about 585.7961692127.

Adding to 201020145 its reverse (541020102), we get a palindrome (742040247).

It can be divided in two parts, 2010 and 20145, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 201020145 in words is "two hundred one million, twenty thousand, one hundred forty-five".