8726021 has 2 divisors, whose sum is σ = 8726022. Its totient is φ = 8726020.

The previous prime is 8726017. The next prime is 8726027. The reversal of 8726021 is 1206278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 829921 = 2810^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 8726021 - 2² = 8726017 is a prime.

It is a super-2 number, since 2×8726021² = 152286884984882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8726027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4363010 + 4363011.

It is an arithmetic number, because the mean of its divisors is an integer number (4363011).

Almost surely, 2^8726021 is an apocalyptic number.

It is an amenable number.

8726021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8726021 is an equidigital number, since it uses as much as digits as its factorization.

8726021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 8726021 is about 2953.9839200646. The cubic root of 8726021 is about 205.8758560143.

The spelling of 8726021 in words is "eight million, seven hundred twenty-six thousand, twenty-one".