1305881 has 2 divisors, whose sum is σ = 1305882. Its totient is φ = 1305880.

The previous prime is 1305869. The next prime is 1305893. The reversal of 1305881 is 1885031.

It is a balanced prime because it is at equal distance from previous prime (1305869) and next prime (1305893).

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 115600 = 1091^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305881 - 2¹⁰ = 1304857 is a prime.

It is a super-2 number, since 2×1305881² = 3410650372322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305881.

It is not a weakly prime, because it can be changed into another prime (1305581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652940 + 652941.

It is an arithmetic number, because the mean of its divisors is an integer number (652941).

2^1305881 is an apocalyptic number.

It is an amenable number.

1305881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305881 is an equidigital number, since it uses as much as digits as its factorization.

1305881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1305881 is about 1142.7515040463. The cubic root of 1305881 is about 109.3036172050.

The spelling of 1305881 in words is "one million, three hundred five thousand, eight hundred eighty-one".