4020556 has 12 divisors (see below), whose sum is σ = 7063840. Its totient is φ = 2002320.

The previous prime is 4020529. The next prime is 4020563. The reversal of 4020556 is 6550204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771 + ... + 2938.

Almost surely, 2^4020556 is an apocalyptic number.

It is an amenable number.

4020556 is a deficient number, since it is larger than the sum of its proper divisors (3043284).

4020556 is a wasteful number, since it uses less digits than its factorization.

4020556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3982 counting only the distinct ones).

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

The square root of 4020556 is about 2005.1324145801. The cubic root of 4020556 is about 159.0115625203.

The spelling of 4020556 in words is "four million, twenty thousand, five hundred fifty-six".