1312140205 has 8 divisors (see below), whose sum is σ = 1575343872. Its totient is φ = 1049195088.

The previous prime is 1312140191. The next prime is 1312140211. The reversal of 1312140205 is 5020412131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312140205 - 2⁵ = 1312140173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53289 + ... + 73918.

It is an arithmetic number, because the mean of its divisors is an integer number (196917984).

Almost surely, 2^1312140205 is an apocalyptic number.

It is an amenable number.

1312140205 is a deficient number, since it is larger than the sum of its proper divisors (263203667).

1312140205 is a wasteful number, since it uses less digits than its factorization.

1312140205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129275.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1312140205 is about 36223.4758823612. The cubic root of 1312140205 is about 1094.7797295373.

Adding to 1312140205 its reverse (5020412131), we get a palindrome (6332552336).

The spelling of 1312140205 in words is "one billion, three hundred twelve million, one hundred forty thousand, two hundred five".