1305560 has 32 divisors (see below), whose sum is σ = 2972160. Its totient is φ = 516096.

The previous prime is 1305559. The next prime is 1305571. The reversal of 1305560 is 655031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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, 4952 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (92880).

2^1305560 is an apocalyptic number.

1305560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305560 is an abundant number, since it is smaller than the sum of its proper divisors (1666600).

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

1305560 is a wasteful number, since it uses less digits than its factorization.

1305560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1305560 is about 1142.6110449317. The cubic root of 1305560 is about 109.2946604582.

The spelling of 1305560 in words is "one million, three hundred five thousand, five hundred sixty".