4120820 has 24 divisors (see below), whose sum is σ = 9440928. Its totient is φ = 1498400.

The previous prime is 4120807. The next prime is 4120829. The reversal of 4120820 is 280214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4120829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9146 + ... + 9585.

It is an arithmetic number, because the mean of its divisors is an integer number (393372).

Almost surely, 2^4120820 is an apocalyptic number.

It is an amenable number.

4120820 is an abundant number, since it is smaller than the sum of its proper divisors (5320108).

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

4120820 is a wasteful number, since it uses less digits than its factorization.

4120820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18751 (or 18749 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4120820 is about 2029.9802954709. The cubic root of 4120820 is about 160.3225265006.

Subtracting from 4120820 its reverse (280214), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 4120820 in words is "four million, one hundred twenty thousand, eight hundred twenty".