1366560 has 144 divisors (see below), whose sum is σ = 5090904. Its totient is φ = 331776.

The previous prime is 1366549. The next prime is 1366577. The reversal of 1366560 is 656631.

1366560 is a `hidden beast` number, since 1 + 3 + 6 + 656 + 0 = 666.

It is a Cunningham number, because it is equal to 1169²-1.

It can be written as a sum of positive squares in 4 ways, for example, as 898704 + 467856 = 948^2 + 684^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a zygodrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18684 + ... + 18756.

2^1366560 is an apocalyptic number.

1366560 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 1366560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2545452).

1366560 is an abundant number, since it is smaller than the sum of its proper divisors (3724344).

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

1366560 is a wasteful number, since it uses less digits than its factorization.

1366560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1366560 is about 1168.9995722839. Note that the first 3 decimals coincide. The cubic root of 1366560 is about 110.9710175124.

The spelling of 1366560 in words is "one million, three hundred sixty-six thousand, five hundred sixty".