4020420 has 48 divisors (see below), whose sum is σ = 11567808. Its totient is φ = 1042560.

The previous prime is 4020409. The next prime is 4020431. The reversal of 4020420 is 240204.

4020420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4020409) and next prime (4020431).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4020396 and 4020405.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1315 + ... + 3125.

It is an arithmetic number, because the mean of its divisors is an integer number (240996).

Almost surely, 2^4020420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5783904).

4020420 is an abundant number, since it is smaller than the sum of its proper divisors (7547388).

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

4020420 is a wasteful number, since it uses less digits than its factorization.

4020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 4020420 is about 2005.0985013211. The cubic root of 4020420 is about 159.0097695828.

Adding to 4020420 its reverse (240204), we get a palindrome (4260624).

The spelling of 4020420 in words is "four million, twenty thousand, four hundred twenty".