1312135 has 8 divisors (see below), whose sum is σ = 1717776. Its totient is φ = 954240.

The previous prime is 1312133. The next prime is 1312139. The reversal of 1312135 is 5312131.

1312135 = 50² + 51² + ... + 159².

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

It is not a de Polignac number, because 1312135 - 2¹ = 1312133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11874 + ... + 11983.

It is an arithmetic number, because the mean of its divisors is an integer number (214722).

2^1312135 is an apocalyptic number.

1312135 is a deficient number, since it is larger than the sum of its proper divisors (405641).

1312135 is a wasteful number, since it uses less digits than its factorization.

1312135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23873.

The product of its digits is 90, while the sum is 16.

The square root of 1312135 is about 1145.4846136025. The cubic root of 1312135 is about 109.4778281944.

Adding to 1312135 its reverse (5312131), we get a palindrome (6624266).

The spelling of 1312135 in words is "one million, three hundred twelve thousand, one hundred thirty-five".