4211820 has 36 divisors (see below), whose sum is σ = 12776400. Its totient is φ = 1123104.

The previous prime is 4211819. The next prime is 4211861. The reversal of 4211820 is 281124.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4211793 and 4211802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11520 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (354900).

Almost surely, 2^4211820 is an apocalyptic number.

It is an amenable number.

4211820 is an abundant number, since it is smaller than the sum of its proper divisors (8564580).

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

4211820 is a wasteful number, since it uses less digits than its factorization.

4211820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23414 (or 23409 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 4211820 is about 2052.2719118090. The cubic root of 4211820 is about 161.4940778116.

Adding to 4211820 its reverse (281124), we get a palindrome (4492944).

The spelling of 4211820 in words is "four million, two hundred eleven thousand, eight hundred twenty".