1311230145 has 32 divisors (see below), whose sum is σ = 2234293632. Its totient is φ = 654359552.

The previous prime is 1311230047. The next prime is 1311230153. The reversal of 1311230145 is 5410321131.

It is a cyclic number.

It is not a de Polignac number, because 1311230145 - 2⁸ = 1311229889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29254 + ... + 58976.

It is an arithmetic number, because the mean of its divisors is an integer number (69821676).

Almost surely, 2^1311230145 is an apocalyptic number.

1311230145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311230145 is a deficient number, since it is larger than the sum of its proper divisors (923063487).

1311230145 is a wasteful number, since it uses less digits than its factorization.

1311230145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29921.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1311230145 is about 36210.9119603470. The cubic root of 1311230145 is about 1094.5265691755.

Adding to 1311230145 its reverse (5410321131), we get a palindrome (6721551276).

The spelling of 1311230145 in words is "one billion, three hundred eleven million, two hundred thirty thousand, one hundred forty-five".