1608281 has 4 divisors (see below), whose sum is σ = 1635600. Its totient is φ = 1580964.

The previous prime is 1608259. The next prime is 1608283. The reversal of 1608281 is 1828061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1608281 is a prime.

It is a super-2 number, since 2×1608281² = 5173135549922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1608281.

It is not an unprimeable number, because it can be changed into a prime (1608283) 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, 13571 + ... + 13688.

It is an arithmetic number, because the mean of its divisors is an integer number (408900).

2^1608281 is an apocalyptic number.

It is an amenable number.

1608281 is a deficient number, since it is larger than the sum of its proper divisors (27319).

1608281 is an equidigital number, since it uses as much as digits as its factorization.

1608281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27318.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1608281 is about 1268.1801922440. The cubic root of 1608281 is about 117.1621440015.

The spelling of 1608281 in words is "one million, six hundred eight thousand, two hundred eighty-one".