1311960841 has 9 divisors (see below), whose sum is σ = 1359849621. Its totient is φ = 1265706624.

The previous prime is 1311960829. The next prime is 1311960863. The reversal of 1311960841 is 1480691131.

The square root of 1311960841 is 36221.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5861241 + 1306099600 = 2421^2 + 36140^2 .

It is not a de Polignac number, because 1311960841 - 2⁵ = 1311960809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311960797 and 1311960806.

It is not an unprimeable number, because it can be changed into a prime (1311960341) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1049785 + ... + 1051033.

Almost surely, 2^1311960841 is an apocalyptic number.

1311960841 is the 36221-st square number.

1311960841 is the 18111-st centered octagonal number.

It is an amenable number.

1311960841 is a deficient number, since it is larger than the sum of its proper divisors (47888780).

1311960841 is an frugal number, since it uses more digits than its factorization.

1311960841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The cubic root of 1311960841 is about 1094.7298433492.

Multiplying 1311960841 by its product of nonzero digits (5184), we get a square (6801204999744 = 2607912²).

The spelling of 1311960841 in words is "one billion, three hundred eleven million, nine hundred sixty thousand, eight hundred forty-one".