1312263205 has 16 divisors (see below), whose sum is σ = 1734887808. Its totient is φ = 944920000.

The previous prime is 1312263193. The next prime is 1312263209. The reversal of 1312263205 is 5023622131.

It is not a de Polignac number, because 1312263205 - 2¹¹ = 1312261157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312263205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312263209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112561 + ... + 123670.

It is an arithmetic number, because the mean of its divisors is an integer number (108430488).

Almost surely, 2^1312263205 is an apocalyptic number.

It is an amenable number.

1312263205 is a deficient number, since it is larger than the sum of its proper divisors (422624603).

1312263205 is a wasteful number, since it uses less digits than its factorization.

1312263205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236348.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1312263205 is about 36225.1736365749. The cubic root of 1312263205 is about 1094.8139366794.

Adding to 1312263205 its reverse (5023622131), we get a palindrome (6335885336).

It can be divided in two parts, 131226 and 3205, that added together give a palindrome (134431).

The spelling of 1312263205 in words is "one billion, three hundred twelve million, two hundred sixty-three thousand, two hundred five".