1312553143 has 8 divisors (see below), whose sum is σ = 1437048720. Its totient is φ = 1188919680.

The previous prime is 1312553129. The next prime is 1312553149. The reversal of 1312553143 is 3413552131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1312553143 - 2¹³ = 1312544951 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 (1312553149) 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, 212338 + ... + 218431.

It is an arithmetic number, because the mean of its divisors is an integer number (179631090).

Almost surely, 2^1312553143 is an apocalyptic number.

1312553143 is a deficient number, since it is larger than the sum of its proper divisors (124495577).

1312553143 is a wasteful number, since it uses less digits than its factorization.

1312553143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431057.

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

The square root of 1312553143 is about 36229.1753011299. The cubic root of 1312553143 is about 1094.8945619653.

It can be divided in two parts, 1312 and 553143, that added together give a palindrome (554455).

The spelling of 1312553143 in words is "one billion, three hundred twelve million, five hundred fifty-three thousand, one hundred forty-three".