555406 has 4 divisors (see below), whose sum is σ = 833112. Its totient is φ = 277702.

The previous prime is 555391. The next prime is 555419. The reversal of 555406 is 604555.

555406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138850 + ... + 138853.

It is an arithmetic number, because the mean of its divisors is an integer number (208278).

2⁵⁵⁵⁴⁰⁶ is an apocalyptic number.

555406 is a deficient number, since it is larger than the sum of its proper divisors (277706).

555406 is a wasteful number, since it uses less digits than its factorization.

555406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277705.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 555406 is about 745.2556608306. The cubic root of 555406 is about 82.1996917680.

It can be divided in two parts, 555 and 406, that added together give a square (961 = 31²).

The spelling of 555406 in words is "five hundred fifty-five thousand, four hundred six".