1605343 has 4 divisors (see below), whose sum is σ = 1627408. Its totient is φ = 1583280.

The previous prime is 1605341. The next prime is 1605349. The reversal of 1605343 is 3435061.

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

It is a cyclic number.

It is not a de Polignac number, because 1605343 - 2¹ = 1605341 is a prime.

It is a super-2 number, since 2×1605343² = 5154252295298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605341) 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, 10923 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (406852).

2^1605343 is an apocalyptic number.

1605343 is a deficient number, since it is larger than the sum of its proper divisors (22065).

1605343 is an equidigital number, since it uses as much as digits as its factorization.

1605343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22064.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1605343 is about 1267.0213100023. The cubic root of 1605343 is about 117.0907567667.

The spelling of 1605343 in words is "one million, six hundred five thousand, three hundred forty-three".