1310644145 has 4 divisors (see below), whose sum is σ = 1572772980. Its totient is φ = 1048515312.

The previous prime is 1310644123. The next prime is 1310644147. The reversal of 1310644145 is 5414460131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414460131 = 52807 ⋅102533.

It can be written as a sum of positive squares in 2 ways, for example, as 788430241 + 522213904 = 28079^2 + 22852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310644145 - 2³⁰ = 236902321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1310644147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131064410 + ... + 131064419.

It is an arithmetic number, because the mean of its divisors is an integer number (393193245).

Almost surely, 2^1310644145 is an apocalyptic number.

It is an amenable number.

1310644145 is a deficient number, since it is larger than the sum of its proper divisors (262128835).

1310644145 is an equidigital number, since it uses as much as digits as its factorization.

1310644145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262128834.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1310644145 is about 36202.8195725140. The cubic root of 1310644145 is about 1094.3634937755.

The spelling of 1310644145 in words is "one billion, three hundred ten million, six hundred forty-four thousand, one hundred forty-five".