201242257 has 2 divisors, whose sum is σ = 201242258. Its totient is φ = 201242256.

The previous prime is 201242221. The next prime is 201242273. The reversal of 201242257 is 752242102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198499921 + 2742336 = 14089^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 201242257 - 2¹⁹ = 200717969 is a prime.

It is not a weakly prime, because it can be changed into another prime (201242207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100621128 + 100621129.

It is an arithmetic number, because the mean of its divisors is an integer number (100621129).

Almost surely, 2^201242257 is an apocalyptic number.

It is an amenable number.

201242257 is a deficient number, since it is larger than the sum of its proper divisors (1).

201242257 is an equidigital number, since it uses as much as digits as its factorization.

201242257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 201242257 is about 14185.9880515951. The cubic root of 201242257 is about 586.0118432300.

Adding to 201242257 its reverse (752242102), we get a palindrome (953484359).

The spelling of 201242257 in words is "two hundred one million, two hundred forty-two thousand, two hundred fifty-seven".