1305464131261 has 2 divisors, whose sum is σ = 1305464131262. Its totient is φ = 1305464131260.

The previous prime is 1305464131229. The next prime is 1305464131267. The reversal of 1305464131261 is 1621314645031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1297307332036 + 8156799225 = 1138994^2 + 90315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305464131261 - 2⁵ = 1305464131229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305464131261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305464131267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652732065630 + 652732065631.

It is an arithmetic number, because the mean of its divisors is an integer number (652732065631).

Almost surely, 2^{1305464131261} is an apocalyptic number.

It is an amenable number.

1305464131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305464131261 is an equidigital number, since it uses as much as digits as its factorization.

1305464131261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 1305464131261 its reverse (1621314645031), we get a palindrome (2926778776292).

The spelling of 1305464131261 in words is "one trillion, three hundred five billion, four hundred sixty-four million, one hundred thirty-one thousand, two hundred sixty-one".