4021626 has 24 divisors (see below), whose sum is σ = 9357120. Its totient is φ = 1148952.

The previous prime is 4021613. The next prime is 4021627. The reversal of 4021626 is 6261204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4021627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6546 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (389880).

Almost surely, 2^4021626 is an apocalyptic number.

4021626 is an abundant number, since it is smaller than the sum of its proper divisors (5335494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021626 is a wasteful number, since it uses less digits than its factorization.

4021626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13698 (or 13691 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4021626 is about 2005.3992121271. The cubic root of 4021626 is about 159.0256673092.

The spelling of 4021626 in words is "four million, twenty-one thousand, six hundred twenty-six".