4000555 has 8 divisors (see below), whose sum is σ = 5170032. Its totient is φ = 2954208.

The previous prime is 4000553. The next prime is 4000561. The reversal of 4000555 is 5550004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4000555 - 2¹ = 4000553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30709 + ... + 30838.

It is an arithmetic number, because the mean of its divisors is an integer number (646254).

Almost surely, 2^4000555 is an apocalyptic number.

4000555 is a deficient number, since it is larger than the sum of its proper divisors (1169477).

4000555 is a wasteful number, since it uses less digits than its factorization.

4000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61565.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 4000555 is about 2000.1387451874. The cubic root of 4000555 is about 158.7474465872.

Adding to 4000555 its reverse (5550004), we get a palindrome (9550559).

The spelling of 4000555 in words is "four million, five hundred fifty-five", and thus it is an aban number.