2022661 has 2 divisors, whose sum is σ = 2022662. Its totient is φ = 2022660.

The previous prime is 2022659. The next prime is 2022701. The reversal of 2022661 is 1662202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1366561 + 656100 = 1169^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022661 - 2¹ = 2022659 is a prime.

Together with 2022659, it forms a pair of twin primes.

It is an Ulam number.

It is equal to p₁₅₀₅₁₇ and since 2022661 and 150517 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011330 + 1011331.

It is an arithmetic number, because the mean of its divisors is an integer number (1011331).

2^2022661 is an apocalyptic number.

It is an amenable number.

2022661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022661 is an equidigital number, since it uses as much as digits as its factorization.

2022661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2022661 is about 1422.2028687919. The cubic root of 2022661 is about 126.4661701889.

Adding to 2022661 its reverse (1662202), we get a palindrome (3684863).

The spelling of 2022661 in words is "two million, twenty-two thousand, six hundred sixty-one".