2001287441 has 2 divisors, whose sum is σ = 2001287442. Its totient is φ = 2001287440.

The previous prime is 2001287383. The next prime is 2001287443. The reversal of 2001287441 is 1447821002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1360134400 + 641153041 = 36880^2 + 25321^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001287441 - 2¹⁴ = 2001271057 is a prime.

Together with 2001287443, 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 (2001287443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000643720 + 1000643721.

It is an arithmetic number, because the mean of its divisors is an integer number (1000643721).

Almost surely, 2^2001287441 is an apocalyptic number.

It is an amenable number.

2001287441 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001287441 is an equidigital number, since it uses as much as digits as its factorization.

2001287441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 2001287441 is about 44735.7512622734. The cubic root of 2001287441 is about 1260.1913375760.

The spelling of 2001287441 in words is "two billion, one million, two hundred eighty-seven thousand, four hundred forty-one".