1300561 has 4 divisors (see below), whose sum is σ = 1332324. Its totient is φ = 1268800.

The previous prime is 1300553. The next prime is 1300571. The reversal of 1300561 is 1650031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48400 + 1252161 = 220^2 + 1119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300561 - 2³ = 1300553 is a prime.

It is a Duffinian number.

1300561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1300501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15820 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (333081).

2^1300561 is an apocalyptic number.

It is an amenable number.

1300561 is a deficient number, since it is larger than the sum of its proper divisors (31763).

1300561 is an equidigital number, since it uses as much as digits as its factorization.

1300561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31762.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1300561 is about 1140.4214133381. The cubic root of 1300561 is about 109.1549853152.

Adding to 1300561 its reverse (1650031), we get a palindrome (2950592).

The spelling of 1300561 in words is "one million, three hundred thousand, five hundred sixty-one".