1363561 has 8 divisors (see below), whose sum is σ = 1415880. Its totient is φ = 1312128.

The previous prime is 1363559. The next prime is 1363577. The reversal of 1363561 is 1653631.

It can be written as a sum of positive squares in 4 ways, for example, as 207936 + 1155625 = 456^2 + 1075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1363561 - 2¹ = 1363559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1363511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4935 + ... + 5203.

It is an arithmetic number, because the mean of its divisors is an integer number (176985).

2^1363561 is an apocalyptic number.

It is an amenable number.

1363561 is a deficient number, since it is larger than the sum of its proper divisors (52319).

1363561 is a wasteful number, since it uses less digits than its factorization.

1363561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its digits is 1620, while the sum is 25.

The square root of 1363561 is about 1167.7161470152. The cubic root of 1363561 is about 110.8897804816.

The spelling of 1363561 in words is "one million, three hundred sixty-three thousand, five hundred sixty-one".