2021626 has 8 divisors (see below), whose sum is σ = 3049920. Its totient is φ = 1004988.

The previous prime is 2021609. The next prime is 2021627. The reversal of 2021626 is 6261202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2021627) 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, 2466 + ... + 3181.

It is an arithmetic number, because the mean of its divisors is an integer number (381240).

2^2021626 is an apocalyptic number.

2021626 is a deficient number, since it is larger than the sum of its proper divisors (1028294).

2021626 is a wasteful number, since it uses less digits than its factorization.

2021626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828.

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

The square root of 2021626 is about 1421.8389500924. The cubic root of 2021626 is about 126.4445955045. Note that the first 3 decimals are identical.

Adding to 2021626 its reverse (6261202), we get a palindrome (8282828).

The spelling of 2021626 in words is "two million, twenty-one thousand, six hundred twenty-six".