1243314131 has 4 divisors (see below), whose sum is σ = 1250260200. Its totient is φ = 1236368064.

The previous prime is 1243314103. The next prime is 1243314143. The reversal of 1243314131 is 1314133421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1314133421 = 293 ⋅4485097.

It is a cyclic number.

It is not a de Polignac number, because 1243314131 - 2⁶ = 1243314067 is a prime.

It is a super-2 number, since 2×1243314131² = 3091660056688570322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243314097 and 1243314106.

It is not an unprimeable number, because it can be changed into a prime (1243314101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472766 + ... + 3473123.

It is an arithmetic number, because the mean of its divisors is an integer number (312565050).

Almost surely, 2^1243314131 is an apocalyptic number.

1243314131 is a deficient number, since it is larger than the sum of its proper divisors (6946069).

1243314131 is an equidigital number, since it uses as much as digits as its factorization.

1243314131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946068.

The product of its digits is 864, while the sum is 23.

The square root of 1243314131 is about 35260.6598208258. The cubic root of 1243314131 is about 1075.2933415442.

Adding to 1243314131 its reverse (1314133421), we get a palindrome (2557447552).

The spelling of 1243314131 in words is "one billion, two hundred forty-three million, three hundred fourteen thousand, one hundred thirty-one".