1312125533 has 4 divisors (see below), whose sum is σ = 1318009728. Its totient is φ = 1306241340.

The previous prime is 1312125527. The next prime is 1312125557. The reversal of 1312125533 is 3355212131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3355212131 = 67 ⋅50077793.

It is a cyclic number.

It is not a de Polignac number, because 1312125533 - 2⁴ = 1312125517 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 (1312125833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2941763 + ... + 2942208.

It is an arithmetic number, because the mean of its divisors is an integer number (329502432).

Almost surely, 2^1312125533 is an apocalyptic number.

It is an amenable number.

1312125533 is a deficient number, since it is larger than the sum of its proper divisors (5884195).

1312125533 is an equidigital number, since it uses as much as digits as its factorization.

1312125533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884194.

The product of its digits is 2700, while the sum is 26.

The square root of 1312125533 is about 36223.2733611969. The cubic root of 1312125533 is about 1094.7756490110.

Adding to 1312125533 its reverse (3355212131), we get a palindrome (4667337664).

The spelling of 1312125533 in words is "one billion, three hundred twelve million, one hundred twenty-five thousand, five hundred thirty-three".