4230621 has 12 divisors (see below), whose sum is σ = 6136572. Its totient is φ = 2808576.

The previous prime is 4230571. The next prime is 4230623. The reversal of 4230621 is 1260324.

It is a happy number.

4230621 is a `hidden beast` number, since 42 + 3 + 0 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2604996 + 1625625 = 1614^2 + 1275^2 .

It is not a de Polignac number, because 4230621 - 2⁷ = 4230493 is a prime.

4230621 is a Rhonda number in base 14.

4230621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4230594 and 4230603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4230623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1645 + ... + 3341.

It is an arithmetic number, because the mean of its divisors is an integer number (511381).

Almost surely, 2^4230621 is an apocalyptic number.

It is an amenable number.

4230621 is a deficient number, since it is larger than the sum of its proper divisors (1905951).

4230621 is a wasteful number, since it uses less digits than its factorization.

4230621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4230621 is about 2056.8473448460. The cubic root of 4230621 is about 161.7340171192.

Adding to 4230621 its reverse (1260324), we get a palindrome (5490945).

It can be divided in two parts, 4230 and 621, that added together give a triangular number (4851 = T₉₈).

The spelling of 4230621 in words is "four million, two hundred thirty thousand, six hundred twenty-one".