1605560 has 64 divisors (see below), whose sum is σ = 4082400. Its totient is φ = 563200.

The previous prime is 1605559. The next prime is 1605563. The reversal of 1605560 is 655061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605563) 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 15 ways as a sum of consecutive naturals, for example, 17996 + ... + 18084.

2^1605560 is an apocalyptic number.

1605560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041200).

1605560 is an abundant number, since it is smaller than the sum of its proper divisors (2476840).

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

1605560 is a wasteful number, since it uses less digits than its factorization.

1605560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1605560 is about 1267.1069410275. The cubic root of 1605560 is about 117.0960323889.

The spelling of 1605560 in words is "one million, six hundred five thousand, five hundred sixty".