1312403135 has 16 divisors (see below), whose sum is σ = 1669631232. Its totient is φ = 988588800.

The previous prime is 1312403083. The next prime is 1312403173. The reversal of 1312403135 is 5313042131.

It is not a de Polignac number, because 1312403135 - 2⁸ = 1312402879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312403135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108686 + ... + 120155.

It is an arithmetic number, because the mean of its divisors is an integer number (104351952).

Almost surely, 2^1312403135 is an apocalyptic number.

1312403135 is a deficient number, since it is larger than the sum of its proper divisors (357228097).

1312403135 is a wasteful number, since it uses less digits than its factorization.

1312403135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228914.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1312403135 is about 36227.1049767988. The cubic root of 1312403135 is about 1094.8528495715.

Adding to 1312403135 its reverse (5313042131), we get a palindrome (6625445266).

The spelling of 1312403135 in words is "one billion, three hundred twelve million, four hundred three thousand, one hundred thirty-five".