8245021 has 4 divisors (see below), whose sum is σ = 8268732. Its totient is φ = 8221312.

The previous prime is 8245001. The next prime is 8245033. The reversal of 8245021 is 1205428.

8245021 = T₂₃₄₃ + T₂₃₄₄ + T₂₃₄₅.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 3132900 = 2261^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 8245021 - 2⁵ = 8244989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8244983 and 8245001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8245001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11326 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (2067183).

Almost surely, 2^8245021 is an apocalyptic number.

8245021 is the 2345-th centered triangular number.

It is an amenable number.

8245021 is a deficient number, since it is larger than the sum of its proper divisors (23711).

8245021 is a wasteful number, since it uses less digits than its factorization.

8245021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23710.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 8245021 is about 2871.4144598090. The cubic root of 8245021 is about 202.0213436912.

The spelling of 8245021 in words is "eight million, two hundred forty-five thousand, twenty-one".