1606855 has 4 divisors (see below), whose sum is σ = 1928232. Its totient is φ = 1285480.

The previous prime is 1606853. The next prime is 1606859. The reversal of 1606855 is 5586061.

1606855 = 515² + 516² + ... + 520².

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

It is not a de Polignac number, because 1606855 - 2¹ = 1606853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606853) 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, 160681 + ... + 160690.

It is an arithmetic number, because the mean of its divisors is an integer number (482058).

2^1606855 is an apocalyptic number.

1606855 is a deficient number, since it is larger than the sum of its proper divisors (321377).

1606855 is an equidigital number, since it uses as much as digits as its factorization.

1606855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321376.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1606855 is about 1267.6178446204. The cubic root of 1606855 is about 117.1275060618.

The spelling of 1606855 in words is "one million, six hundred six thousand, eight hundred fifty-five".