126315131 has 2 divisors, whose sum is σ = 126315132. Its totient is φ = 126315130.

The previous prime is 126315113. The next prime is 126315139. The reversal of 126315131 is 131513621.

Together with previous prime (126315113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126315131 - 2¹⁰ = 126314107 is a prime.

It is a super-2 number, since 2×126315131² = 31911024639094322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126315097 and 126315106.

It is not a weakly prime, because it can be changed into another prime (126315139) 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 as a sum of consecutive naturals, namely, 63157565 + 63157566.

It is an arithmetic number, because the mean of its divisors is an integer number (63157566).

Almost surely, 2^126315131 is an apocalyptic number.

126315131 is a deficient number, since it is larger than the sum of its proper divisors (1).

126315131 is an equidigital number, since it uses as much as digits as its factorization.

126315131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 126315131 is about 11239.0004448794. Note that the first 3 decimals coincide. The cubic root of 126315131 is about 501.7473941137.

Adding to 126315131 its reverse (131513621), we get a palindrome (257828752).

The spelling of 126315131 in words is "one hundred twenty-six million, three hundred fifteen thousand, one hundred thirty-one".