1655560 has 16 divisors (see below), whose sum is σ = 3725100. Its totient is φ = 662208.

The previous prime is 1655557. The next prime is 1655569. The reversal of 1655560 is 655561.

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 1764 = 1286^2 + 42^2 .

It is not an unprimeable number, because it can be changed into a prime (1655569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20655 + ... + 20734.

2^1655560 is an apocalyptic number.

1655560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655560 is an abundant number, since it is smaller than the sum of its proper divisors (2069540).

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

1655560 is a wasteful number, since it uses less digits than its factorization.

1655560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41400 (or 41396 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1655560 is about 1286.6856647993. The cubic root of 1655560 is about 118.2991547569.

Subtracting from 1655560 its reverse (655561), we obtain a palindrome (999999).

The spelling of 1655560 in words is "one million, six hundred fifty-five thousand, five hundred sixty".