4221642 has 16 divisors (see below), whose sum is σ = 8716032. Its totient is φ = 1361760.

The previous prime is 4221641. The next prime is 4221643. The reversal of 4221642 is 2461224.

It is an interprime number because it is at equal distance from previous prime (4221641) and next prime (4221643).

It is a super-2 number, since 2×4221642² = 35644522352328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4221641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11163 + ... + 11534.

It is an arithmetic number, because the mean of its divisors is an integer number (544752).

Almost surely, 2^4221642 is an apocalyptic number.

4221642 is an abundant number, since it is smaller than the sum of its proper divisors (4494390).

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

4221642 is a wasteful number, since it uses less digits than its factorization.

4221642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22733.

The product of its digits is 768, while the sum is 21.

The square root of 4221642 is about 2054.6634760953. The cubic root of 4221642 is about 161.6195155417.

Adding to 4221642 its reverse (2461224), we get a palindrome (6682866).

The spelling of 4221642 in words is "four million, two hundred twenty-one thousand, six hundred forty-two".