2006021 has 2 divisors, whose sum is σ = 2006022. Its totient is φ = 2006020.

The previous prime is 2006009. The next prime is 2006033. The reversal of 2006021 is 1206002.

It is a balanced prime because it is at equal distance from previous prime (2006009) and next prime (2006033).

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 784996 = 1105^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006021 - 2⁶ = 2005957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2005993 and 2006011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003010 + 1003011.

It is an arithmetic number, because the mean of its divisors is an integer number (1003011).

2^2006021 is an apocalyptic number.

It is an amenable number.

2006021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006021 is an equidigital number, since it uses as much as digits as its factorization.

2006021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2006021 is about 1416.3407075983. The cubic root of 2006021 is about 126.1184114030.

The spelling of 2006021 in words is "two million, six thousand, twenty-one".