126257231 has 2 divisors, whose sum is σ = 126257232. Its totient is φ = 126257230.

The previous prime is 126257123. The next prime is 126257233. The reversal of 126257231 is 132752621.

It is a happy number.

Together with previous prime (126257123) 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 126257231 - 2¹⁸ = 125995087 is a prime.

It is a super-2 number, since 2×126257231² = 31881776759574722, which contains 22 as substring.

Together with 126257233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126257194 and 126257203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126257233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63128615 + 63128616.

It is an arithmetic number, because the mean of its divisors is an integer number (63128616).

Almost surely, 2^126257231 is an apocalyptic number.

126257231 is a deficient number, since it is larger than the sum of its proper divisors (1).

126257231 is an equidigital number, since it uses as much as digits as its factorization.

126257231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 126257231 is about 11236.4242977915. The cubic root of 126257231 is about 501.6707191769.

The spelling of 126257231 in words is "one hundred twenty-six million, two hundred fifty-seven thousand, two hundred thirty-one".