201245641 has 2 divisors, whose sum is σ = 201245642. Its totient is φ = 201245640.

The previous prime is 201245621. The next prime is 201245647. The reversal of 201245641 is 146542102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 84713616 = 10795^2 + 9204^2 .

It is a cyclic number.

It is not a de Polignac number, because 201245641 - 2¹⁵ = 201212873 is a prime.

It is not a weakly prime, because it can be changed into another prime (201245647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100622820 + 100622821.

It is an arithmetic number, because the mean of its divisors is an integer number (100622821).

Almost surely, 2^201245641 is an apocalyptic number.

It is an amenable number.

201245641 is a deficient number, since it is larger than the sum of its proper divisors (1).

201245641 is an equidigital number, since it uses as much as digits as its factorization.

201245641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 201245641 is about 14186.1073237164. The cubic root of 201245641 is about 586.0151279161.

Adding to 201245641 its reverse (146542102), we get a palindrome (347787743).

The spelling of 201245641 in words is "two hundred one million, two hundred forty-five thousand, six hundred forty-one".