1608865 has 8 divisors (see below), whose sum is σ = 1940328. Its totient is φ = 1280640.

The previous prime is 1608839. The next prime is 1608883. The reversal of 1608865 is 5688061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31329 + 1577536 = 177^2 + 1256^2 .

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

It is not a de Polignac number, because 1608865 - 2¹¹ = 1606817 is a prime.

It is a Duffinian number.

1608865 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1608865.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475 + ... + 1855.

It is an arithmetic number, because the mean of its divisors is an integer number (242541).

2^1608865 is an apocalyptic number.

It is an amenable number.

1608865 is a deficient number, since it is larger than the sum of its proper divisors (331463).

1608865 is a wasteful number, since it uses less digits than its factorization.

1608865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1608865 is about 1268.4104225368. The cubic root of 1608865 is about 117.1763236156.

It can be divided in two parts, 160 and 8865, that added together give a square (9025 = 95²).

The spelling of 1608865 in words is "one million, six hundred eight thousand, eight hundred sixty-five".