1605340 has 24 divisors (see below), whose sum is σ = 3678192. Its totient is φ = 583680.

The previous prime is 1605323. The next prime is 1605341. The reversal of 1605340 is 435061.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3429 + ... + 3868.

It is an arithmetic number, because the mean of its divisors is an integer number (153258).

2^1605340 is an apocalyptic number.

1605340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1605340 is an abundant number, since it is smaller than the sum of its proper divisors (2072852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605340 is a wasteful number, since it uses less digits than its factorization.

1605340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7317 (or 7315 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1605340 is about 1267.0201261227. The cubic root of 1605340 is about 117.0906838285.

The spelling of 1605340 in words is "one million, six hundred five thousand, three hundred forty".