1300661 has 4 divisors (see below), whose sum is σ = 1335852. Its totient is φ = 1265472.

The previous prime is 1300639. The next prime is 1300669. The reversal of 1300661 is 1660031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1660031 = 1033 ⋅1607.

It can be written as a sum of positive squares in 2 ways, for example, as 481636 + 819025 = 694^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300661 - 2⁶ = 1300597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300669) 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, 17540 + ... + 17613.

It is an arithmetic number, because the mean of its divisors is an integer number (333963).

2^1300661 is an apocalyptic number.

It is an amenable number.

1300661 is a deficient number, since it is larger than the sum of its proper divisors (35191).

1300661 is an equidigital number, since it uses as much as digits as its factorization.

1300661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35190.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1300661 is about 1140.4652559372. The cubic root of 1300661 is about 109.1577828820.

Adding to 1300661 its reverse (1660031), we get a palindrome (2960692).

The spelling of 1300661 in words is "one million, three hundred thousand, six hundred sixty-one".