71035021 has 2 divisors, whose sum is σ = 71035022. Its totient is φ = 71035020.

The previous prime is 71035009. The next prime is 71035031. The reversal of 71035021 is 12053017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70056900 + 978121 = 8370^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 71035021 - 2⁵ = 71034989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71035021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71035031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35517510 + 35517511.

It is an arithmetic number, because the mean of its divisors is an integer number (35517511).

Almost surely, 2^71035021 is an apocalyptic number.

It is an amenable number.

71035021 is a deficient number, since it is larger than the sum of its proper divisors (1).

71035021 is an equidigital number, since it uses as much as digits as its factorization.

71035021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 71035021 is about 8428.2276310029. The cubic root of 71035021 is about 414.1498461826.

Adding to 71035021 its reverse (12053017), we get a palindrome (83088038).

The spelling of 71035021 in words is "seventy-one million, thirty-five thousand, twenty-one".