201252145 has 4 divisors (see below), whose sum is σ = 241502580. Its totient is φ = 161001712.

The previous prime is 201252133. The next prime is 201252151. The reversal of 201252145 is 541252102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541252102 = 2 ⋅270626051.

It can be written as a sum of positive squares in 2 ways, for example, as 118004769 + 83247376 = 10863^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 201252145 - 2⁷ = 201252017 is a prime.

It is an unprimeable number.

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, 20125210 + ... + 20125219.

It is an arithmetic number, because the mean of its divisors is an integer number (60375645).

Almost surely, 2^201252145 is an apocalyptic number.

It is an amenable number.

201252145 is a deficient number, since it is larger than the sum of its proper divisors (40250435).

201252145 is an equidigital number, since it uses as much as digits as its factorization.

201252145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40250434.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 201252145 is about 14186.3365602258. The cubic root of 201252145 is about 586.0214409329.

The spelling of 201252145 in words is "two hundred one million, two hundred fifty-two thousand, one hundred forty-five".