2021471 has 2 divisors, whose sum is σ = 2021472. Its totient is φ = 2021470.

The previous prime is 2021431. The next prime is 2021489. The reversal of 2021471 is 1741202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021471 is a prime.

It is a super-3 number, since 3×2021471³ = 24781283763778410333, which contains 333 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010735 + 1010736.

It is an arithmetic number, because the mean of its divisors is an integer number (1010736).

2^2021471 is an apocalyptic number.

2021471 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021471 is an equidigital number, since it uses as much as digits as its factorization.

2021471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2021471 is about 1421.7844421712. The cubic root of 2021471 is about 126.4413638792.

Adding to 2021471 its reverse (1741202), we get a palindrome (3762673).

The spelling of 2021471 in words is "two million, twenty-one thousand, four hundred seventy-one".