4020256 has 24 divisors (see below), whose sum is σ = 8027964. Its totient is φ = 1981440.

The previous prime is 4020227. The next prime is 4020257. The reversal of 4020256 is 6520204.

It can be written as a sum of positive squares in 2 ways, for example, as 3920400 + 99856 = 1980^2 + 316^2 .

It is not an unprimeable number, because it can be changed into a prime (4020257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1476 + ... + 3196.

Almost surely, 2^4020256 is an apocalyptic number.

It is an amenable number.

4020256 is a deficient number, since it is larger than the sum of its proper divisors (4007708).

4020256 is a wasteful number, since it uses less digits than its factorization.

4020256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4020256 is about 2005.0576051575. The cubic root of 4020256 is about 159.0076074574.

The spelling of 4020256 in words is "four million, twenty thousand, two hundred fifty-six".