4056520 has 64 divisors (see below), whose sum is σ = 10206000. Its totient is φ = 1440768.

The previous prime is 4056517. The next prime is 4056527. The reversal of 4056520 is 256504.

It can be written as a sum of positive squares in 8 ways, for example, as 285156 + 3771364 = 534^2 + 1942^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4056491 and 4056500.

It is not an unprimeable number, because it can be changed into a prime (4056527) 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 15 ways as a sum of consecutive naturals, for example, 14946 + ... + 15214.

Almost surely, 2^4056520 is an apocalyptic number.

4056520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4056520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5103000).

4056520 is an abundant number, since it is smaller than the sum of its proper divisors (6149480).

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

4056520 is a wasteful number, since it uses less digits than its factorization.

4056520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 4056520 is about 2014.0804353352. The cubic root of 4056520 is about 159.4842769720.

The spelling of 4056520 in words is "four million, fifty-six thousand, five hundred twenty".