1311465105 has 12 divisors (see below), whose sum is σ = 2273206260. Its totient is φ = 699448032.

The previous prime is 1311465097. The next prime is 1311465109. The reversal of 1311465105 is 5015641131.

1311465105 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 4 + 651 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 147768336 + 1163696769 = 12156^2 + 34113^2 .

It is not a de Polignac number, because 1311465105 - 2³ = 1311465097 is a prime.

It is a super-2 number, since 2×1311465105² = 3439881443265322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311465109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14571790 + ... + 14571879.

It is an arithmetic number, because the mean of its divisors is an integer number (189433855).

Almost surely, 2^1311465105 is an apocalyptic number.

1311465105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311465105 is a deficient number, since it is larger than the sum of its proper divisors (961741155).

1311465105 is a wasteful number, since it uses less digits than its factorization.

1311465105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29143680 (or 29143677 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1311465105 is about 36214.1561409347. The cubic root of 1311465105 is about 1094.5919415294.

The spelling of 1311465105 in words is "one billion, three hundred eleven million, four hundred sixty-five thousand, one hundred five".