201442457 has 2 divisors, whose sum is σ = 201442458. Its totient is φ = 201442456.

The previous prime is 201442429. The next prime is 201442459. The reversal of 201442457 is 754244102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182223001 + 19219456 = 13499^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 201442457 - 2¹⁸ = 201180313 is a prime.

Together with 201442459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201442459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100721228 + 100721229.

It is an arithmetic number, because the mean of its divisors is an integer number (100721229).

Almost surely, 2^201442457 is an apocalyptic number.

It is an amenable number.

201442457 is a deficient number, since it is larger than the sum of its proper divisors (1).

201442457 is an equidigital number, since it uses as much as digits as its factorization.

201442457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 201442457 is about 14193.0425561259. The cubic root of 201442457 is about 586.2061044325.

Adding to 201442457 its reverse (754244102), we get a palindrome (955686559).

The spelling of 201442457 in words is "two hundred one million, four hundred forty-two thousand, four hundred fifty-seven".