1311057045 has 12 divisors (see below), whose sum is σ = 2272498956. Its totient is φ = 699230400.

The previous prime is 1311056993. The next prime is 1311057073. The reversal of 1311057045 is 5407501131.

It can be written as a sum of positive squares in 2 ways, for example, as 497780721 + 813276324 = 22311^2 + 28518^2 .

It is not a de Polignac number, because 1311057045 - 2¹² = 1311052949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14567256 + ... + 14567345.

It is an arithmetic number, because the mean of its divisors is an integer number (189374913).

Almost surely, 2^1311057045 is an apocalyptic number.

1311057045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311057045 is a deficient number, since it is larger than the sum of its proper divisors (961441911).

1311057045 is a wasteful number, since it uses less digits than its factorization.

1311057045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29134612 (or 29134609 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1311057045 is about 36208.5217179603. The cubic root of 1311057045 is about 1094.4784029839.

Adding to 1311057045 its reverse (5407501131), we get a palindrome (6718558176).

The spelling of 1311057045 in words is "one billion, three hundred eleven million, fifty-seven thousand, forty-five".