201765001 has 2 divisors, whose sum is σ = 201765002. Its totient is φ = 201765000.

The previous prime is 201764999. The next prime is 201765007. The reversal of 201765001 is 100567102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 40449600 = 12701^2 + 6360^2 .

It is a cyclic number.

It is not a de Polignac number, because 201765001 - 2¹ = 201764999 is a prime.

Together with 201764999, it forms a pair of twin primes.

It is equal to p_11171263 and since 201765001 and 11171263 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (201765007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100882500 + 100882501.

It is an arithmetic number, because the mean of its divisors is an integer number (100882501).

Almost surely, 2^201765001 is an apocalyptic number.

It is an amenable number.

201765001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201765001 is an equidigital number, since it uses as much as digits as its factorization.

201765001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 201765001 is about 14204.4007617358. The cubic root of 201765001 is about 586.5188098392.

The spelling of 201765001 in words is "two hundred one million, seven hundred sixty-five thousand, one".