2001420571 has 2 divisors, whose sum is σ = 2001420572. Its totient is φ = 2001420570.

The previous prime is 2001420569. The next prime is 2001420607. The reversal of 2001420571 is 1750241002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001420571 - 2¹ = 2001420569 is a prime.

Together with 2001420569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2001420511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000710285 + 1000710286.

It is an arithmetic number, because the mean of its divisors is an integer number (1000710286).

Almost surely, 2^2001420571 is an apocalyptic number.

2001420571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001420571 is an equidigital number, since it uses as much as digits as its factorization.

2001420571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 2001420571 is about 44737.2391973398. The cubic root of 2001420571 is about 1260.2192805140.

Adding to 2001420571 its reverse (1750241002), we get a palindrome (3751661573).

The spelling of 2001420571 in words is "two billion, one million, four hundred twenty thousand, five hundred seventy-one".