126251287 has 2 divisors, whose sum is σ = 126251288. Its totient is φ = 126251286.

The previous prime is 126251269. The next prime is 126251317. The reversal of 126251287 is 782152621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126251287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126251207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63125643 + 63125644.

It is an arithmetic number, because the mean of its divisors is an integer number (63125644).

Almost surely, 2^126251287 is an apocalyptic number.

126251287 is a deficient number, since it is larger than the sum of its proper divisors (1).

126251287 is an equidigital number, since it uses as much as digits as its factorization.

126251287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 126251287 is about 11236.1597977245. The cubic root of 126251287 is about 501.6628464197.

The spelling of 126251287 in words is "one hundred twenty-six million, two hundred fifty-one thousand, two hundred eighty-seven".