1312855601 has 4 divisors (see below), whose sum is σ = 1315131492. Its totient is φ = 1310579712.

The previous prime is 1312855591. The next prime is 1312855639. The reversal of 1312855601 is 1065582131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 877048225 + 435807376 = 29615^2 + 20876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312855601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312855501) 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, 1137080 + ... + 1138233.

It is an arithmetic number, because the mean of its divisors is an integer number (328782873).

Almost surely, 2^1312855601 is an apocalyptic number.

It is an amenable number.

1312855601 is a deficient number, since it is larger than the sum of its proper divisors (2275891).

1312855601 is an equidigital number, since it uses as much as digits as its factorization.

1312855601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275890.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1312855601 is about 36233.3492931581. The cubic root of 1312855601 is about 1094.9786561313.

The spelling of 1312855601 in words is "one billion, three hundred twelve million, eight hundred fifty-five thousand, six hundred one".