126636287 has 2 divisors, whose sum is σ = 126636288. Its totient is φ = 126636286.

The previous prime is 126636241. The next prime is 126636347. The reversal of 126636287 is 782636621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126636287 - 2⁸ = 126636031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126636187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63318143 + 63318144.

It is an arithmetic number, because the mean of its divisors is an integer number (63318144).

Almost surely, 2^126636287 is an apocalyptic number.

126636287 is a deficient number, since it is larger than the sum of its proper divisors (1).

126636287 is an equidigital number, since it uses as much as digits as its factorization.

126636287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 126636287 is about 11253.2789443788. The cubic root of 126636287 is about 502.1722648636.

The spelling of 126636287 in words is "one hundred twenty-six million, six hundred thirty-six thousand, two hundred eighty-seven".