1312532555 has 4 divisors (see below), whose sum is σ = 1575039072. Its totient is φ = 1050026040.

The previous prime is 1312532503. The next prime is 1312532563. The reversal of 1312532555 is 5552352131.

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

It is not a de Polignac number, because 1312532555 - 2¹⁰ = 1312531531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131253251 + ... + 131253260.

It is an arithmetic number, because the mean of its divisors is an integer number (393759768).

Almost surely, 2^1312532555 is an apocalyptic number.

1312532555 is a deficient number, since it is larger than the sum of its proper divisors (262506517).

1312532555 is an equidigital number, since it uses as much as digits as its factorization.

1312532555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262506516.

The product of its digits is 22500, while the sum is 32.

The square root of 1312532555 is about 36228.8911643732. The cubic root of 1312532555 is about 1094.8888372937. Note that the first 4 decimals are identical.

Adding to 1312532555 its reverse (5552352131), we get a palindrome (6864884686).

The spelling of 1312532555 in words is "one billion, three hundred twelve million, five hundred thirty-two thousand, five hundred fifty-five".