8070521 has 2 divisors, whose sum is σ = 8070522. Its totient is φ = 8070520.

The previous prime is 8070487. The next prime is 8070523. The reversal of 8070521 is 1250708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 2958400 = 2261^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 8070521 - 2⁶ = 8070457 is a prime.

It is a super-2 number, since 2×8070521² = 130266618422882, which contains 22 as substring.

Together with 8070523, 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 (8070523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4035260 + 4035261.

It is an arithmetic number, because the mean of its divisors is an integer number (4035261).

Almost surely, 2^8070521 is an apocalyptic number.

It is an amenable number.

8070521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8070521 is an equidigital number, since it uses as much as digits as its factorization.

8070521 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 23.

The square root of 8070521 is about 2840.8662411314. The cubic root of 8070521 is about 200.5859565978.

The spelling of 8070521 in words is "eight million, seventy thousand, five hundred twenty-one".