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8012021 is a prime number
BaseRepresentation
bin11110100100000011110101
3120002001102112
4132210003311
54022341041
6443420405
7125046443
oct36440365
916061375
108012021
114582606
122824705
131876a54
1410c7b93
15a83deb
hex7a40f5

8012021 has 2 divisors, whose sum is σ = 8012022. Its totient is φ = 8012020.

The previous prime is 8012003. The next prime is 8012029. The reversal of 8012021 is 1202108.

Adding to 8012021 its reverse (1202108), we get a palindrome (9214129).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4363921 + 3648100 = 2089^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 8012021 - 222 = 3817717 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8011987 and 8012005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8012029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4006010 + 4006011.

It is an arithmetic number, because the mean of its divisors is an integer number (4006011).

Almost surely, 28012021 is an apocalyptic number.

It is an amenable number.

8012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8012021 is an equidigital number, since it uses as much as digits as its factorization.

8012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 8012021 is about 2830.5513597177. The cubic root of 8012021 is about 200.1001248667.

The spelling of 8012021 in words is "eight million, twelve thousand, twenty-one".