1311041145 has 16 divisors (see below), whose sum is σ = 2098344960. Its totient is φ = 698995584.

The previous prime is 1311041141. The next prime is 1311041159. The reversal of 1311041145 is 5411401131.

It is not a de Polignac number, because 1311041145 - 2² = 1311041141 is a prime.

It is a super-2 number, since 2×1311041145² = 3437657767765822050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311041141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40552 + ... + 65318.

It is an arithmetic number, because the mean of its divisors is an integer number (131146560).

Almost surely, 2^1311041145 is an apocalyptic number.

1311041145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311041145 is a deficient number, since it is larger than the sum of its proper divisors (787303815).

1311041145 is a wasteful number, since it uses less digits than its factorization.

1311041145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28304.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1311041145 is about 36208.3021557211. The cubic root of 1311041145 is about 1094.4739784938.

Adding to 1311041145 its reverse (5411401131), we get a palindrome (6722442276).

The spelling of 1311041145 in words is "one billion, three hundred eleven million, forty-one thousand, one hundred forty-five".