1312513534 has 4 divisors (see below), whose sum is σ = 1968770304. Its totient is φ = 656256766.

The previous prime is 1312513507. The next prime is 1312513537. The reversal of 1312513534 is 4353152131.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312513537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328128382 + ... + 328128385.

It is an arithmetic number, because the mean of its divisors is an integer number (492192576).

Almost surely, 2^1312513534 is an apocalyptic number.

1312513534 is a deficient number, since it is larger than the sum of its proper divisors (656256770).

1312513534 is an equidigital number, since it uses as much as digits as its factorization.

1312513534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656256769.

The product of its digits is 5400, while the sum is 28.

The square root of 1312513534 is about 36228.6286519377. The cubic root of 1312513534 is about 1094.8835482868.

Adding to 1312513534 its reverse (4353152131), we get a palindrome (5665665665).

The spelling of 1312513534 in words is "one billion, three hundred twelve million, five hundred thirteen thousand, five hundred thirty-four".